A square inscribed in a triangle. Two areas are given. What is the square’s area?
A square is divided in two quadrilaterals of given area. What fraction of the square’s perimeter is red?
Two circles and a radius connecting their centres. What is the length of the parallel chord?
Four quarter circles of radius 1, each containing a square. What is the blue area?
Three touching circles in a rectangle and a common tangent. What’s the angle?
A unit square, a semicircle, a right triangle and an isosceles triangle. What is the total purple area?
Two similar rectangles. If the small one has area 4 what is the area of the large rectangle?
A semicircle and two quarter circles pass through the same point. What’s the angle α?
A blue parallelogram with an extended diagonal. What is the proportion green : orange?
An isosceles triangle with two inscribed congruent semicircles. What is the angle α?