A regular hexagon, a circle through its red centre and two line segments. What’s blue : orange?
Tilted hourglass III

A regular hexagon, a circle through its red centre and two line segments. What’s blue : orange?
What is the area of the purple people eater, in terms of the lengths AD and BC?
An equilateral triangle inside a rectangle. What is red : yellow : blue?
What is the area of the coloured figure? Can you determine the area without counting the number of squares in each different-coloured shape?
An equilateral triangle with a circular arc through its red centre and two vertices. If the yellow area equals the green one, what’s the angle α?
A parallelogram and four equilateral triangles. What is yellow : green?
A square with two right angles. What fraction is yellow?
How does the white area inside the big semicircle compare to the combined white areas of the 3 smaller semicircles below it? Equally coloured semicircles are congruent.
A regular hexagon with two diagonals and two perpendiculars. What’s red : yellow?
A triangle with three concurring cevians. What’s orange : blue?