# The circle

## The perimeter of a semicircle

Remember that the is the distance round the outside.

A semicircle has two edges. One is half of a circumference and the other is a diameter.

Remember this is the circumference of the whole circle, so now we need to half this answer.

Total perimeter

## Area of a circle

For any circle with radius, r, the area, A, is found using the formula:

## The area of a semicircle

A semicircle is just half of a circle. To find the of a semicircle we calculate the area of the whole circle and then half the answer.

Area of semicircle

## The area of a combined shape

This shape is made up of a rectangle and a semicircle.

To find the total area we just find the area of each part and add them together.

Area of the rectangle = length x breadth