Weekly Problem #1

Welcome to the Weekly Problem Series, where every week I post an example problem from secondary school maths tests. See if you can do it!

This week’s problem: A field is in the shape of a triangle. It is surrounded by a fence, which is 200m long overall. The longest side of the field has an 80m fence along it. The other two sides are the same length. How long is one of the shorter sides? (Try using a diagram.)

The answer will be in next week’s Weekly Problem.