Categories
Intermediate

Cross the line

An equilateral triangle with two line segments crossing exactly on the semicircle. What is the proportion red : green?

Categories
Intermediate

The baby block

Two squares and an extended side. Prove that red : green = blue : yellow.

Categories
Beginner

The England win

A unit square containing two red overlapping congruent rectangles. If they cover exactly half the square’s area, what is their width x?