Circle Geometry Quiz

What is the formula for calculating the circumference of a circle?

• 2r

• πr^2

• 2πr

• πr

Tags

TEKS.MATH.7.9B

John has a circular garden. If the radius of his garden is 'r', what is the formula he should use to calculate the diameter of his garden?

• radius * 2

• 2 * radius

• radius + radius

• radius / 2

What is the formula for calculating the radius of a circle?

• r = d/5

• r = d/3

• r = d/2

• r = d/4

A bicycle wheel has a circumference of 62.8 cm. What is the diameter of the wheel?

• 20 cm

• 25 cm

• 15 cm

• 10 cm

Tags

TEKS.MATH.7.9B

If the diameter of a circle is 12 cm, what is its radius?

• 6 cm

• 15 cm

• 9 cm

• 3 cm

John has a circular garden with a radius of 5 cm. What is the circumference of his garden?

• 31.4 cm

• 78.5 cm

• 62.8 cm

• 47.1cm

Tags

TEKS.MATH.7.9B

A wheel of a bicycle has a circumference of 36π cm. What is the radius of the wheel?

• 18 cm

• 24 cm

• 12 cm

• 9 cm

Tags

TEKS.MATH.7.9B

John has a circular garden with a diameter of 16 cm. How long would the fencing be if he decides to fence the entire garden?

• 12.56 cm

• 100.48 cm

• 50.24 cm

• 25.12 cm

Tags

TEKS.MATH.7.9B

John has a circular garden with a radius of 8 cm. What is the diameter of his garden?

• 20 cm

• 16 cm

• 12 cm

• 4 cm

John has a circular garden with a circumference of 30 cm. Can you help him find out the radius of his garden?

• 6.28 cm

• 3.14 cm

• 9.54 cm

• 4.77 cm

Tags

TEKS.MATH.7.9B