A V&A employee looks up at the Dome Projection and triangular paintings recreating tiled interiors of mosque domes in Isfahan which are on display at Epic Iran, an exhibition soon to open at the V&A in London, Britain, May 25, 2021. Picture taken May 25, 2021. REUTERS/Peter Nicholls 

A V&A employee looks up at the Dome Projection and triangular paintings recreating tiled interiors of mosque domes in Isfahan which are on display at Epic Iran, an exhibition soon to open at the V&A in London, Britain, May 25, 2021. Picture taken May 25, 2021. REUTERS/Peter Nicholls 

Visitors stand near 'Through No.3', by British artist Liz West, a six metre long triangular prism corridor, which forms part of the Kensington and Chelsea Art Week Public Art Trail, in London, Britain October 11, 2020. REUTERS/Toby Melville 

Visitors stand near 'Through No.3', by British artist Liz West, a six metre long triangular prism corridor, which forms part of the Kensington and Chelsea Art Week Public Art Trail, in London, Britain October 11, 2020. REUTERS/Toby Melville 

Visitors stand near 'Through No.3', by British artist Liz West, a six metre long triangular prism corridor, which forms part of the Kensington and Chelsea Art Week Public Art Trail, in London, Britain October 11, 2020. REUTERS/Toby Melville 

Tourists watch the sunset in the Caucasus mountains outside Krasnaya Polyana near Sochi, Russia September 30, 2019. Picture taken September 30, 2019. REUTERS/Maxim Shemetov TPX IMAGES OF THE DAY 

Participants scale a triangular obstacle at the Spartan obstacle course race (OCR) in Wrotham, Kent, Britain May 5, 2019. Picture taken May 5, 2019. REUTERS/Christian Radnedge 

Cricket - T20 Triangular Tournament - Netherlands v Nepal- Lord's Cricket Ground, London, Britain - July 29, 2018 Nepal's Basant Regmi celebrates the wicket of The Netherlands' Tim Visee Action Images via Reuters/Paul Childs TPX IMAGES OF THE DAY 

Cricket - T20 Triangular Tournament - Netherlands v Nepal- Lord's Cricket Ground, London, Britain - July 29, 2018 The Netherlands' Max O'Dowd Action Images via Reuters/Paul Childs 

Cricket - T20 Triangular Tournament - Netherlands v Nepal- Lord's Cricket Ground, London, Britain - July 29, 2018 Nepal's Karan KC celebrates the wicket of The Netherlands' Max O'Dowd Action Images via Reuters/Paul Childs 

Cricket - T20 Triangular Tournament - Netherlands v Nepal- Lord's Cricket Ground, London, Britain - July 29, 2018 Nepal's Karan KC celebrates the wicket of The Netherlands' Max O'Dowd with teammate Action Images via Reuters/Paul Childs 

Cricket - T20 Triangular Tournament - Netherlands v Nepal- Lord's Cricket Ground, London, Britain - July 29, 2018 The Netherlands' Wesley Barresi in action Action Images via Reuters/Paul Childs 

Cricket - T20 Triangular Tournament - Netherlands v Nepal- Lord's Cricket Ground, London, Britain - July 29, 2018 The Netherlands' Ryan ten Doeschate in action Action Images via Reuters/Paul Childs 

Cricket - T20 Triangular Tournament - Netherlands v Nepal- Lord's Cricket Ground, London, Britain - July 29, 2018 The Netherlands' Michael Rippon in action Action Images via Reuters/Paul Childs 

Cricket - T20 Triangular Tournament - Netherlands v Nepal- Lord's Cricket Ground, London, Britain - July 29, 2018 Nepal's Basant Regmi celebrates the wicket of The Netherlands' Tim Visee Action Images via Reuters/Paul Childs 

Cricket - T20 Triangular Tournament - MCC v Netherlands - Lord's Cricket Ground, London, Britain - July 29, 2018 Tim Visee of The Netherlands in action Action Images via Reuters/Paul Childs 

Cricket - T20 Triangular Tournament - MCC v Netherlands - Lord's Cricket Ground, London, Britain - July 29, 2018 Tim Visee of The Netherlands in action Action Images via Reuters/Paul Childs 

Cricket - T20 Triangular Tournament - MCC v Netherlands - Lord's Cricket Ground, London, Britain - July 29, 2018 Antonius Staal of The Netherlands is stumped by James Foster of The MCC Action Images via Reuters/Paul Childs 

Cricket - T20 Triangular Tournament - MCC v Netherlands - Lord's Cricket Ground, London, Britain - July 29, 2018 Tim Visee of The Netherlands in action Action Images via Reuters/Paul Childs 

Cricket - T20 Triangular Tournament - MCC v Netherlands - Lord's Cricket Ground, London, Britain - July 29, 2018 Scott Edwards of The Netherlands in action Action Images via Reuters/Paul Childs 

Cricket - T20 Triangular Tournament - MCC v Netherlands - Lord's Cricket Ground, London, Britain - July 29, 2018 Tim Visee of The Netherlands in action Action Images via Reuters/Paul Childs 

Cricket - T20 Triangular Tournament - MCC v Netherlands - Lord's Cricket Ground, London, Britain - July 29, 2018 Paul van Meekeren of The Netherland's celebrates taking the wicket of The MCC's Matt Coles with Bas de Leede Action Images via Reuters/Paul Childs 

Cricket - T20 Triangular Tournament - MCC v Netherlands - Lord's Cricket Ground, London, Britain - July 29, 2018 The MCC's Jonathan Trott in action Action Images via Reuters/Paul Childs 

Cricket - T20 Triangular Tournament - MCC v Netherlands - Lord's Cricket Ground, London, Britain - July 29, 2018 The MCC's Jonathan Trott in action Action Images via Reuters/Paul Childs 

Cricket - T20 Triangular Tournament - MCC v Netherlands - Lord's Cricket Ground, London, Britain - July 29, 2018 The MCC's Jonathan Trott in action Action Images via Reuters/Paul Childs 

Cricket - T20 Triangular Tournament - MCC v Netherlands - Lord's Cricket Ground, London, Britain - July 29, 2018 The MCC's Dylan Budge in action Action Images via Reuters/Paul Childs 

Cricket - T20 Triangular Tournament - MCC v Netherlands - Lord's Cricket Ground, London, Britain - July 29, 2018 The MCC's Varun Chopra in action Action Images via Reuters/Paul Childs 

Cricket - T20 Triangular Tournament - MCC v Nepal- Lord's Cricket Ground, London, Britain - July 29, 2018 Nepal's Gyanendra Malla celebrates the wicket of The MCC's Jonathan Trott with teammates Action Images via Reuters/Paul Childs 

Cricket - T20 Triangular Tournament - MCC v Nepal- Lord's Cricket Ground, London, Britain - July 29, 2018 The MCC's Mahela Jayawardene in action Action Images via Reuters/Paul Childs 

Cricket - T20 Triangular Tournament - MCC v Nepal- Lord's Cricket Ground, London, Britain - July 29, 2018 Nepal and MCC members watching the cricket Action Images via Reuters/Paul Childs 

Cricket - T20 Triangular Tournament - MCC v Nepal- Lord's Cricket Ground, London, Britain - July 29, 2018 The MCC's Mahela Jayawardene in action Action Images via Reuters/Paul Childs 

Cricket - T20 Triangular Tournament - MCC v Nepal- Lord's Cricket Ground, London, Britain - July 29, 2018 Nepal's Gyanendra Malla celebrates the wicket of The MCC's Jonathan Trott with teammate Action Images via Reuters/Paul Childs 

Cricket - T20 Triangular Tournament - MCC v Nepal- Lord's Cricket Ground, London, Britain - July 29, 2018 Nepal's Subash Khakurel celebrates the wicket of The MCC's James Foster with teammates Action Images via Reuters/Paul Childs 

Cricket - T20 Triangular Tournament - MCC v Nepal- Lord's Cricket Ground, London, Britain - July 29, 2018 The MCC's Matt Coles in action Action Images via Reuters/Paul Childs 

Cricket - T20 Triangular Tournament - MCC v Nepal- Lord's Cricket Ground, London, Britain - July 29, 2018 The MCC's Mahela Jayawardene in action Action Images via Reuters/Paul Childs 

Cricket - T20 Triangular Tournament - MCC v Nepal- Lord's Cricket Ground, London, Britain - July 29, 2018 Nepal's Subash Khakurel in action Action Images via Reuters/Paul Childs 

Cricket - T20 Triangular Tournament - MCC v Nepal- Lord's Cricket Ground, London, Britain - July 29, 2018 Nepal's Gyanendra Malla in action Action Images via Reuters/Paul Childs 

Cricket - T20 Triangular Tournament - MCC v Netherlands v Nepal- Lord’s Cricket Ground, London, Britain - July 29, 2018 General view of covers on the pitch as rain delays the start of play Action Images via Reuters/Paul Childs 

Cricket - T20 Triangular Tournament - MCC v Netherlands v Nepal- Lord’s Cricket Ground, London, Britain - July 29, 2018 General view of covers on the pitch as rain delays the start of play Action Images via Reuters/Paul Childs 

Cricket - T20 Triangular Tournament - MCC v Netherlands v Nepal- Lord’s Cricket Ground, London, Britain - July 29, 2018 General view of covers on the pitch as rain delays the start of play Action Images via Reuters/Paul Childs 

Cricket - T20 Triangular Tournament - MCC v Netherlands v Nepal- Lord’s Cricket Ground, London, Britain - July 29, 2018 General view of covers on the pitch as rain delays the start of play Action Images via Reuters/Paul Childs 

Special red and blue shots offered at Escobar bar to mark the summit meeting between U.S. President Donald Trump and North Korean leader Kim Jong Un, are displayed on a table in Singapore June 4, 2018. REUTERS/Edgar Su TPX IMAGES OF THE DAY 

16th century musketeers' triangular powder flasks are displayed at the Palace Armoury in Valletta, Malta, March 23, 2018. REUTERS/Darrin Zammit Lupi 

A bas-relief of the head of Medusa is seen on top of a sarcophagus displayed at the old city of Caesarea, Israel. April 26, 2017 REUTERS/Amir Cohen 

A boy places billiard balls on a table to form a triangle in Abu Shock IDPs camp in Al Fashir, capital of North Darfur, Sudan, September 6, 2016. REUTERS/Mohamed Nureldin Abdallah 

General view of ADAC headquarters triangular office tower in Munich, Germany August 24, 2016. REUTERS/Michaela Rehle 

General view of ADAC headquarters triangular office tower in Munich, Germany August 24, 2016. REUTERS/Michaela Rehle 

General view of ADAC headquarters triangular office tower in Munich, Germany August 24, 2016. REUTERS/Michaela Rehle 

A man walks past the rotating triangular sign outside New Scotland Yard in central London March 17, 2015. The watchdog which oversees British police said it had launched an investigation into allegations London police chiefs dropped inquiries into child sex abuse claims because they involved politicians and high profile figures. The Independent Police Complaints Commission (IPCC) said it would examine allegations police suppressed evidence, hindered investigations into paedophile rings and covered up crimes because they involved lawmakers (MPs) and police officers. REUTERS/Stefan Wermuth (BRITAIN - Tags: CRIME LAW POLITICS)

The rotating triangular sign is seen outside New Scotland Yard in central London March 17, 2015. The watchdog which oversees British police said it had launched an investigation into allegations London police chiefs dropped inquiries into child sex abuse claims because they involved politicians and high profile figures. The Independent Police Complaints Commission (IPCC) said it would examine allegations police suppressed evidence, hindered investigations into paedophile rings and covered up crimes because they involved lawmakers (MPs) and police officers. REUTERS/Stefan Wermuth (BRITAIN - Tags: CRIME LAW POLITICS)

The rotating triangular sign is seen outside New Scotland Yard in central London March 17, 2015. The watchdog which oversees British police said it had launched an investigation into allegations London police chiefs dropped inquiries into child sex abuse claims because they involved politicians and high profile figures. The Independent Police Complaints Commission (IPCC) said it would examine allegations police suppressed evidence, hindered investigations into paedophile rings and covered up crimes because they involved lawmakers (MPs) and police officers. REUTERS/Stefan Wermuth (BRITAIN - Tags: CRIME LAW POLITICS)

Spanish model, Raquel Bonilla, 22, poses inside an elevator as she wears a creation by Myriam Hurtado during an urban photo shooting part of the Andalucia de Moda (Andalusia Fashion) in Seville, southern Spain November 4, 2014. REUTERS/Marcelo del Pozo (SPAIN - Tags: FASHION SOCIETY TPX IMAGES OF THE DAY) 

A warning sign is seen near an electricity pylon in Nottingham, central England, September 10, 2014. Britain risks an electricity crisis this winter which has forced the grid operator to take precautionary measures and will mean greater reliance on imports from Europe where operators face their own supply constraints. National Grid has announced a scheme to encourage utilities to make idle capacity available this winter, something the grid operator had not planned to do until next year. REUTERS/Darren Staples (BRITAIN - Tags: BUSINESS ENERGY) 

Buddhist monks sit on the grass as they pray in front of the Royal Palace during a ceremony in Phnom Penh July 10, 2014. A three-day royal procession to take the remains of late Cambodian King Norodom Sihanouk from the cremation site to the Royal Palace began on Thursday. REUTERS/Samrang Pring (CAMBODIA - Tags: POLITICS ROYALS RELIGION OBITUARY TPX IMAGES OF THE DAY) 

The ADAC headquarters triangular office tower is pictured next to a red traffic light before the annual news conference in Munich June 30, 2014. REUTERS/Michaela Rehle (GERMANY - Tags: BUSINESS CITYSCAPE POLITICS TRANSPORT) 

The German car club ADAC headquarters triangular office tower is pictured next to a red traffic light before the annual news conference in Munich June 30, 2014. REUTERS/Michaela Rehle (GERMANY - Tags: BUSINESS CITYSCAPE POLITICS TRANSPORT LOGO) 

The ADAC headquarters triangular office tower is pictured before the annual news conference in Munich June 30, 2014. REUTERS/Michaela Rehle (GERMANY - Tags: BUSINESS CITYSCAPE POLITICS TRANSPORT LOGO) 

The ADAC headquarters triangular office tower is pictured in Munich January 20, 2014. German media reported on Sunday that the influential ADAC automobile club's 2013 member survey to identify their favourite car could have been manipulated. The claims are denied by the ADAC. REUTERS/Michaela Rehle (GERMANY - Tags: TRANSPORT POLITICS CITYSPACE TPX IMAGES OF THE DAY) 

The ADAC headquarters triangular office tower is pictured in Munich January 20, 2014. German media reported on Sunday that the influential ADAC automobile club's 2013 member survey to identify their favourite car could have been manipulated. The claims are denied by the ADAC. REUTERS/Michaela Rehle (GERMANY - Tags: TRANSPORT POLITICS CITYSPACE) 

The ADAC headquarters triangular office tower is pictured next to a 'One Way' traffic sign in Munich January 20, 2014. German media reported on Sunday that the influential ADAC automobile club's 2013 member survey to identify their favourite car could have been manipulated. The claims are denied by the ADAC. REUTERS/Michaela Rehle (GERMANY - Tags: TRANSPORT POLITICS CITYSPACE)