Copyright © University of Cambridge. All rights reserved.

'Trapezium Arch' printed from http://nrich.maths.org/

Show menu

See all short problems arranged by curriculum topic in the short problems collection

 


Arch madefrom 10 stonesTen stones, of identical shape and size, are used to make an arch, as shown in the diagram. Each stone has a cross-section in the shape of a trapezium with equal sides. What is the size of the smallest angles of the trapezium?

 

 

If you liked this problem, here is an NRICH task which challenges you to use similar mathematical ideas.

 

 



 

This problem is taken from the UKMT Mathematical Challenges.