Categories
Intermediate

The red dot

A right triangle with its incircle. What is the red fraction?

Categories
Intermediate

Stars on 45

A square containing a rectangle. What is the red fraction?

Categories
Intermediate

Pandora’s box II

Five squares and a diagonal. What fraction of the largest square is coloured?

Categories
Intermediate

Four six four

A regular hexagon and two similar rectangles. What fraction is green?

Categories
Intermediate

Uneven brickwork

A rectangle is divided into six rectangles of equal area. What fraction is green?

Categories
Beginner

Bandaged head

A regular decagon and triangles from vertices and side midpoints. What fraction is red?

Categories
Beginner

The brick pile

Three congruent rectangles inscribed in a triangle. What fraction is brown?

Categories
Beginner

Lemon slice II

A semicircle inscribed in a quarter circle. What fraction is yellow?

Categories
Intermediate

Stuck in the corner

A square with a diagonal and a right triangle. What fraction is red?

Categories
Beginner

The two-state solution

Two congruent squares share a vertex. What fraction is yellow?