A five pointed star is made by extending sides of a regular pentagon. What fraction of star on right is shaded yellow?
A twelve pointed star is made by extending the sides of a regular 12-sided polygon (a dodecagon). What is the measure of the grey angle?
Every other side of a regular decagon is extended to form a regular pentagon, find the ratio of two shaded regions?
A square is in the first quadrant, as shown, with its sides extending to points on the x-axis of (3, 0), (5, 0), (7, 0) and (13, 0). What is the area of the square?
What fraction of the quarter circle is shaded by the semicircle?
The area of the small regular pentagon is A. The area of the big regular pentagon is B. What is A/B?
