Two congruent rectangles and squares. Proof that the four points are on one circle.
Two regular pentagons share a vertex. What’s the angle α?
A regular octagon containing a blue hexagon. All line segments have equal length. What fraction is blue?
Four squares and five shared vertices. If the orange area is 4, what is the green area?
A square, two equilateral triangles and an extended side. What is the proportion yellow : blue?
A square contains three squares (black sides), one of which has an extended side (blue). What is the proportion yellow : blue?
A triangle containing two tangent semicircles. What’s the proportion α : β?
A square with four congruent equilateral triangles. What fraction is yellow?
Two squares and two given areas. What’s the total area?
An equilateral triangle inscribed in a circle is divided by a diameter parallel to one of it’s sides. What is the proportion light : dark blue?