Area and Circumference of a Circle

Abigail, Michael, and Benjamin are planning to build a circular garden. They need to know the length of the fence they need to enclose the garden. If 'r' is the radius of the garden, which formula should they use to calculate the circumference of the garden?

• 2 * π * r^2

• π * r^2

• 2 * π * r + r

• 2 * π * r

Olivia, Grace, and Anika are working on a project in their math class. They are asked to find the area of a circular garden with a radius of 8 cm. They know that they should use π = 3.14. What is the area of the garden?

• 16.28 cm^2

• 200.96 cm^2

• 64 cm^2

• 50.24 cm^2

Liam is planning to build a circular garden in his backyard. He knows the radius of the garden. Can you help Liam to find the area of his circular garden?

• A = 2πr

• A = πr^2

• A = 2r^2

• A = πr

Abigail, Grace, and Evelyn are working on a project in their math class. They are given a circular garden with an area of 78.5 cm² to design. If they use π = 3.14, what would be the radius of the garden?

• 10 cm

• 3 cm

• 5 cm

• 7 cm

Find the circumference of a circle with a diameter of 11 millimeters.

• 34.6 mm

• 30 mm

• 25.3 mm

• 34.54 cm

what is the circumference of this circle ?

• 3.14 cm 

• 37.7 cm

• 24 cm

• 68.4 cm

Find the area of the circle

• 56.52

• 254.34

• 1017.36

• 113.04

What is the diameter?

• 8

• 16

• 10

What is the circumference?

• 48

• 96

• 24

• 18

A bicycle tire has a diameter of 27 inches. How far does the bike travel along the ground when the wheel rotates once? What is the circumference of this tire?

• 81

• 15.5

• 27

• 13