A rectangle is divided into four similar triangles. What fraction is blue?
Four rectangles. The green and red rectangle are similar. What’s the area proportion of the orange and the blue rectangle?
A rectangle is inscribed in a regular hexagon, covering 14/27 of its area. What is red : yellow : green?
A square and a rectangle share two vertices. If the square has twice the area of the rectangle, what’s the angle α?
A square containing a red square of variable size sharing a vertex with a blue rectangle. What is the maximal blue fraction?
The apex of a parabola is the shared vertex of two rectangles. Proof that the rectangles are similar.
An equilateral triangle inscribed in a rectangle. What is its area X in terms of triangle areas A and B?
A rectangle containing four triangles. What is the total area?
A rectangle with three line segments. What’s the proportion red : yellow?
One corner of a rectangular piece of paper is folded back and forth to the opposite side. What is the proportion red : blue?