SOAR Geo | 9-2 Area of a Circle

$$A=\pi r^2$$

$$A=\frac{r^2}{2}$$

$$A=2\pi r$$

$$A=\pi d$$

Multiplying it by three.

Multiplying a number by itself

Adding it to itself twice.

Divide it by two.

π is an irrational number (it never ends!)

π is the ratio of the circumference & diameter of a circle.

π is a letter in the Greek alphabet.

A = 4 ft × 4 ft

A = π(4 ft)²

A = π(4 ft)

A = 2π(4 ft)

50.24 feet

50.24 feet²

50.24 inches

50.24 inches²

$$A=2\pi(2)$$

$$A=\pi(2)$$

$$A=4^2$$

$$A=\pi(2)^2$$

12.56 miles

12.56 miles²

12.56 miles³

12.56 feet

$$A=\pi(22)$$

$$A=\pi(11)^2$$

$$A=\pi(22)^2$$

$$A=2\pi(11)$$

379.94 mm

379.94 mm²

379.94 m

379.94 m³