# The formula for the area of a circle

# P = Pi • r^{2}

Legend:

# P – the area of the circle

# Pi – number pi = 3,1415

# r – radius of the circle

Sample task:

Calculate the area of a circle with a radius 6 cm.

## P = Pi • r^{2}

## P = 3,1415 • (6cm •6cm)

## P = 3,1415 • 36 cm^{2}

## P = 113,094 cm^{2}

## The formula for the area of a circle

Legend:

# P – the area of the circle

# Pi – number pi = 3,1415

# d – Diameter of a circle