If you knew that the radius of the big circle and the big arcs is 5 cm, what is the area of the yellow region?

Yellow area = 7.3 EXPLANATION

Two congruent circles of radius 5 cm are drawn in such a way that one is 1 cm below the other . Find the area of red coloured region?

The blue figure is made of five quarter-circle arcs (each with integer radius) and a segment of length 4, which is the base of a square grid.

What is the area of the blue figure?

A circle has a radius of 12 units and its center is at one vertex of a square. The square has a side of 12 units. Find the area of the shaded region?

Each circle has radius 1. What is the area of the green region in the following image?