Categories
Beginner

The pine forest

A square containing a quarter circle. What’s the proportion blue : brown : green?

Categories
Intermediate

Tomba La Bomba

Three regular hexagons inside a circle. Two shared vertices and five vertices on the circle. What’s red : green?

Categories
Beginner

The dome tent

A rectangle with a diagonal and an inscribed semicircle. What is red : green : blue?

Categories
Intermediate

The tightrope dancer

A circle containing an isosceles and two equilateral triangles. What is the proportion orange : blue?

Categories
Intermediate

The hidden pyramid

A triangle with an inscribed equilateral triangle. If areas A and B add up to C, what are the proportions A : B : C?

Categories
Intermediate

Down to earth

Two equilateral triangles share a vertex. What is the proportion red : green?

Categories
Beginner

The leftover package

An isosceles triangle with an inscribed square and three triangles. What is the proportion black : red?

Categories
Intermediate

Brothers in arms

The tangency points of two tangents of a circle are connected. Three perpendiculars are drawn from a point on the circle, of which two have a given length. What’s the proportion red : yellow?

Categories
Beginner

David and Goliath

Two squares share a vertex. What’s the proportion blue : green?

Categories
Intermediate

The hawfinch

An equilateral triangle with a circle tangent to two sides. The vertices are the tangency points. What is the length proportion of line segments x : y?