Area of a circle

a line from the center point to the edge of the circle

• diameter
• radio
• radius
• pi

Tags

CCSS.HSG.C.A.2

CCSS.HSG.CO.A.1

What is the formula for area of a circle given the radius?

• A = πr
• A = 2πr
• A = πd
• A = πr²

Tags

CCSS.7.G.B.4

a line that goes from one edge of the circle to another and crosses the center point

• center
• diameter
• dime eater
• radius

Tags

CCSS.HSG.C.A.2

What is the radius of this circle?

• 18
• 10
• 9
• 8

Tags

CCSS.7.G.B.4

What is the area of this circle?

• 25π

• 10π

• π

• 5π

Tags

CCSS.HSG.GMD.A.1

What is the area of this circle?

• 4π

• 8π

• 16π

• π

Tags

CCSS.7.G.B.4

What is the area of this circle?

• 12π

• 6π

• 144π

• 36π

Tags

CCSS.HSG.GMD.A.1

The diameter of Carol's old records from the 80s is 12 inches. Which equation would help you determine the area?

• A = 12π
• A = 2π12
• A = π(12²)
• A = π(6²)

Find the exact area of a circle with radius of 9 inches.

• 9 π in²

• 18 π in²

• 81 π in²

• 36 π in²

Find the exact area of a circle with diameter of 20 inches.

• 100 π in²

• 20 π in²

• 400 π in²

• 40 π in²