Four squares and two shared vertices. What fraction is blue?
A triangle divided by three line segments. What fraction is blue?
Two squares and an extended side. What’s the angle α?
An equilateral triangle with two line segments crossing exactly on the semicircle. What is the proportion red : green?
Two squares and an extended side. Prove that red : green = blue : yellow.
A unit square containing two red overlapping congruent rectangles. If they cover exactly half the square’s area, what is their width x?