Categories
Intermediate

The fez

A circle and a semicircle inside a square. What’s the length proportion of the two chords?

Categories
Intermediate

The cleaver

Four squares, a rectangle and a circle. What is the proportion brown : grey?

Categories
Intermediate

Ice cube

A rectangle and a square. What is the proportion purple : blue?

Categories
Intermediate

The swinging pyramid

A regular hexagon and two equilateral triangles share a vertex. What is the area proportion blue : yellow?

Categories
Beginner

The skyscraper

A blue parallelogram with an extended diagonal. What is the proportion green : orange?

Categories
Intermediate

The face mask

A triangle having one side tangent to the circle is split into two triangles. What is the proportion blue : purple?

Categories
Intermediate

The three rights

A trapezium containing three right angles is split in two. What is the proportion of the areas yellow : blue?

Categories
Intermediate

The right angle

Two triangles inside a quarter circle. What is their area proportion?

Categories
Intermediate

Up and down

A semicircle and a square. Three secants and a tangent form two triangles. What is their area proportion?

Categories
Intermediate

The attic room

A blue square is topped with a right triangle. Using line segments to the top, a green quadrilateral is constructed with at least two right angles. What is the area proportion green : blue?