Orange and green semicircles with equally long but perpendicular diameters (both length 2) are partially covered by a blue canopy at angle α. What is the orange area, which is not covered by either of the other regions, in terms of α?
A square with a diagonal and a right triangle. What fraction is red?
Four squares. The red vertex is the centroid of the red triangle. What is the yellow area?
The blue square blades are twice as long as the red triangle sides. What is the ratio of red to yellow areas?
Two congruent squares share a vertex. What fraction is yellow?
What is the ratio of areas, purple/green, when the orange octagon is regular (all angles equal)?
Several line segments, some of which are parallel. What is green : orange?
Show that the light blue area is the same as the dark green area.
A square, its diagonal and six smaller squares. What fraction is purple?
What is the full bat area (including the enclosed white parts) divided by that of its (equilateral triangular) upper torso?