Area and Circumference of circles

A circular rug has a radius of 2.5m. What is the circumference of the rug to the nearest meter?

• 16m

• 5m

• 8m

• 20m

Tags

CCSS.7.G.B.4

What is the formula for the area of a circle with radius r?

• A = 2πr
• A = πr^2
• A = πd
• A = 2r

Tags

CCSS.7.G.B.4

What is the circumference of a circle with diameter 10cm?

• 10π cm

• 20π cm

• 5π cm

• 100π cm

Tags

CCSS.7.G.B.4

What is the area of a circle with diameter 14cm?

• 49π cm^2

• 196π cm^2

• 98π cm^2

• 28π cm^2

Tags

CCSS.7.G.B.4

What is the circumference of a circle with radius 6cm?

• 12π cm

• 36π cm

• 18π cm

• 6π cm

Tags

CCSS.7.G.B.4

What is the area of a circle with radius 8cm?

• 16π cm^2
• 64π cm^2
• 128π cm^2
• 32π cm^2

Tags

CCSS.7.G.B.4

A pizza has a diameter of 20cm. What is the area of the pizza to the nearest square centimeter?

• 314 cm^2

• 201 cm^2

• 100 cm^2

• 1256 cm^2

Tags

CCSS.7.G.B.4

A circular table has a radius of 1.5m. What is the circumference of the table to the nearest meter?

• 9m

• 3m

• 4m

• 7m

Tags

CCSS.7.G.B.4

A circular fountain has a diameter of 8m. What is the area of the water surface to the nearest square meter?

• 50m^2
• 201m^2
• 100m^2
• 25m^2

Tags

CCSS.7.G.B.4

A circular garden has a radius of 5m. How many meters of fencing would be needed to surround the garden completely?

• 10π m

• 15π m

• 25π m

• 50π m

Tags

CCSS.7.G.B.4