Area of a Circle from Radius

Hannah drew a circle with a radius of 30 cm. Jonas drew a circle with a radius of 20 cm. What is the approximate difference in the areas of their circles?

• 2,826 cm²

• 1,570 cm²

• 1,256 cm²

• 314 cm²

Tags

CCSS.7.G.B.4

Find the area of the circle

• 56.52

• 254.34

• 1017.36

• 113.04

Tags

CCSS.7.G.B.4

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

What is the area of a circle with a radius of 21 cm?

• 1384.74 cm²

• 2142.12 cm²

• 4348.08 cm²

• 1289.12 cm²

Tags

CCSS.7.G.B.4

Ms. Catall is using a compass to find her way out of the woods. The compass has a radius of 4 centimeters. What is the compass's area?

• 49.2 cm²

• 45.6 cm²

• 50.24 cm²

• 55.9 cm²

Tags

CCSS.7.G.B.4

Ms. Catall is using a compass to find her way out of the woods. The compass has a radius of 4 centimeters. What is the compass's area? (a)  

• 49.2 cm²

• 45.6 cm²

• 50.24 cm2

• 55.9 cm²

Tags

CCSS.7.G.B.4

What is the radius of this circle?

• 140

• 35

• 70

Tags

CCSS.7.G.B.4

Shring's dining room table is round and has a radius of 4.5 feet. What is the tabletop's area?

• 63.585 ft²

• 68.345 ft²

• 64.585 ft²

• 61.345 ft²

Tags

CCSS.7.G.B.4

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

• 66cm

• 78.5cm

• 66.5cm

• 10m

Tags

CCSS.7.G.B.4

find the area of the circle below.

• 100 cm

• 225 cm

• 9 cm

• 28.26 cm

Tags

CCSS.7.G.B.4