Two ribbons are laid over each other so that they cross. Can you find the area of the overlap?
How much of the inside of this triangular prism can Clare paint using a cylindrical roller?
Weekly Problem 28 - 2008
The diagram shows a semi-circle and an isosceles triangle which have equal areas. What is the value of tan x?
Weekly Problem 43 - 2009
This diagram has symmetry of order four. Can you use different geometric properties to find a particular length?