Area of a Circle

Area of a Circle

Area of a Circle

• Area is the amount of space inside of a shape.

• We use formulas to find the area. The formula for area of a circle is:

• A = 𝝅 r²

• 𝝅 or pi is 3.14...

• r is the radius, or the distance from the center of the circle to the outside of the circle.

Multiple Choice

What is the formula for areaof a circle given the radius?

• A = πr

• A = 2πr

• A = πd

• A = πr²

Multiple Choice

Is the red line a radius or diameter of the circle?

• Radius
• Diameter

Multiple Choice

If the diameter of a circle is 50 yards, the radius is _____

• 100 yards
• 25 yards
• 150 yards
• 15 yards

Multiple Choice

What is the area of this circle?

• 82.13

• 78.54

• 314.16

• 170.12

Multiple Choice

What is the area of this circle?

• 6082.12

• 1520.53

• 1893.14

• 1292.92

Multiple Choice

find the area of the circle below.

• 100 cm

• 225 cm

• 9 cm

• 28.26 cm

Multiple Choice

Find the area of the circle

• 43.96

• 153.86

• 87.82

• 307.72

Multiple Choice

Find the area of the circle

• 56.52

• 254.34

• 1017.36

• 113.04

Multiple Choice

what is the area of a circle with the diameter of 10cm ?

• 66cm

• 78.5cm

• 66.5cm

• 10m

Multiple Choice

A cruise ship has a large, circular window. It has a diameter of 8 meters. What is the window's area?

• 31.25 m²

• 29.55 m²

• 30.36 m²

• 50.27 m²