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 regular pentagon with a diagonal and an extended side. What is the top angle of the isosceles triangle?
A square with the origin halfway one of its sides. The coordinates of two vertices are given. What is the square’s area?
A semicircle containing two equilateral triangles containing a circle. What fraction is blue?
A semicircle and two quarter circles pass through the same point. What’s the angle α?
Two squares and two diagonals. Two areas are given. What is the total area?
Three squares and three shared vertices. Prove the three red vertices are collinear.
A regular hexagon and two equilateral triangles share a vertex. What is the area proportion blue : yellow?
Two line segments and three rectangles, two of which have a given area. What is the yellow area?