The area of the small regular pentagon is A. The area of the big regular pentagon is B. What is A/B?
1/2*(7-(3*5^0.5)) ~ 0.15
What is the ratio of the area of big pentagon and small pentagon in the following image?
A five pointed star is made by extending sides of a regular pentagon. What fraction of star on right is shaded yellow?
Every other side of a regular decagon is extended to form a regular pentagon, find the ratio of two shaded regions?
How many triangles are there in a regular pentagon with all its diagonals drawn?
Note: a regular pentagon has five straight sides all of the same length and five equal angles. A diagonal is a line joining points.
A triangle, a square, a pentagon, a hexagon, an octagon and a circle all have an equal perimeter, which one has the smallest area?
