Categories
Intermediate

Under the volcano

A square containing a right isosceles and an equilateral triangle. What’s the angle α?

Categories
Intermediate

The Pisa experiment

Four squares and an altitude to the top vertex form a right yellow traingle. What is the proportion yellow : green?

Categories
Beginner

The parrot

Two squares, a diagonal and a line segment. What is red : blue : green?

Categories
Intermediate

Boxed in

A square with an inscribed right triangle. What fraction is yellow?

Categories
Intermediate

An equitable portion

A square, its diagonals and a right triangle. What fraction is green?

Categories
Beginner

The green deal

Three squares, one of which has a side length of 2. What is the green area?

Categories
Intermediate

Le Petit Nicolas

Two parallel squares with four line segments connecting opposing vertices. Prove that they pass through a single point.

Categories
Intermediate

Emerging from water

Two squares and an extended side. What’s red : green : pink?

Categories
Beginner

The movie film

Four squares and two shared vertices. What fraction is blue?

Categories
Beginner

The guylines

Two squares and an extended side. What’s the angle α?