Categories
Intermediate

Together we stand

Two squares sharing a vertex. What’s the angle α?

Categories
Intermediate

Triple dice

An equilateral triangle with three congruent squares. What’s the angle α?

Categories
Beginner

The pentagon push

Two regular pentagons share a vertex. What’s the angle α?

Categories
Intermediate

Warning triangle II

A square, a triangle and two equal angles. What is the angle α?

Categories
Beginner

Seventies tipi II

A triangle containing two tangent semicircles. What’s the proportion α : β?

Categories
Intermediate

The spotlight

A right triangle with two cevians. What’s the angle α?

Categories
Intermediate

Tilted hourglass II

Two equilateral triangles inside a square. What’s the proportion green : orange?

Categories
Beginner

Surf the wave

A white triangle in a blue square. What is it’s top angle α?

Categories
Intermediate

The glass pyramid

The vertices of an equilateral triangle are connected to an interior point. What is the angle α?

Categories
Beginner

The two jabs

Two congruent equilateral triangles share a vertex. What is the angle α?