Unit Test CD

What is the formula for finding the area of a circle?

• A = π·d

• C = 2·π·r

• A = π·r²

• C = π·d

Tags

CCSS.7.G.B.4

What number does π represent?

• 4.13

• 3.41

• pie

• 3.14

Tags

CCSS.HSG.GMD.A.1

What is the radius of a circle?

• halfway through a circle

• a line through the center of a circle

• the amount of space inside of the circle

• the distance around a circle

Tags

CCSS.HSG.C.A.2

CCSS.HSG.CO.A.1

Find the area of the circle.

• 18.84 m²

• 113.04 m²

• 37.68 m²

• 452.16 m²

Tags

CCSS.7.G.B.4

Find the area of the circle

• 56.52 in²

• 254.34 in²

• 1017.36 in²

• 113.04 in

Ms. Johnson is using a compass to find her way out of the woods. The compass has a radius of 1 inch. What is half of the compass's area? hint: use area of a semicircle formula

• 1.57 in²

• 3.14 in²

• 12.56 in²

• 2.26 in²

what is the area of this semicircle ?

d = 8 cm

• 100.48 cm²

• 80 cm²

• 200.96 cm²

• 25.12 cm²

Jesse used rope to stake a circular region in which to plant a garden. The diameter of the region is 20 inches. What is the approximate area of half of the garden? hint: think area of semicircle.

• A= 31.4 in²

• A= 314 in²

• A= 157 in²

• A= 628 in²

What does r represent in the formula:

A = π·r²

• circumference

• radius

• diameter

• squared

Tags

CCSS.7.G.B.4

Find the Perimeter

• 74 in²

• 69 in

• 82 in

• 67 in