Two congruent circles and a right triangle inside a semicircle. What fraction is blue?
A square inscribed in a triangle. Two areas are given. What is the square’s area?
Four squares, a rectangle and a circle. What is the proportion brown : grey?
A square is divided in two quadrilaterals of given area. What fraction of the square’s perimeter is red?
A rectangle and a square. What is the proportion purple : blue?
A rectangle with two crossing line segments. What’s the minimal shaded fraction?
Four quarter circles of radius 1, each containing a square. What is the blue area?
A triangle is split in two. What is the area of the green quadrilateral in terms of lengths a and b?
A right triangle is split in two. What is the maximum yellow fraction?
A unit square, a semicircle, a right triangle and an isosceles triangle. What is the total purple area?