Two squares sharing a vertex and a line segment. What’s the yellow area?
Tumbler doll II
Three squares and a circle. The red point is a common intersection of two square sides and the circle. What is blue : green?
The Pythagoras bug
Two blue squares and two red right triangles. What are the proportions of the triangle sides?
Author: Matthew Arcus.
The Suresh triplet
Two squares share a vertex. What’s blue : green : orange?
To the max
Two squares and two line segments. If the angle α is maximal, what is yellow : red?
The film projector
A square and two congruent circles with three common tangents. What’s yellow : red?
The douche cabine
A square containing three smaller squares and a quarter circle. What fraction is orange?
Three squares and two perpendicular line segments. What is red : yellow : blue?
Outside the hive
A regular hexagon and two squares. What’s the angle α?
A fair division II
Two squares sharing a vertex, a diagonal and a line segment. Prove that the two angles are congruent.