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Advanced

Kindergarten

A circle with three tangents and two squares. The accentuated vertex is a tangency point. What’s the angle α?

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Beginner

The dark lord

Two congruent equilateral triangles and two squares. What’s the angle α?

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Intermediate

The pointy shoe

A quarter circle, a semicircle and a triangle. What’s the angle α?

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?