Circles

What is the radius of a circle

• Half of the diameter

• Another word for diameter

• The perimeter

• The entire circle

What is the formula for the circumference of a circle?

• 2πr

• πr^2

• π

• 2π

What is the formula for the area of a circle?

• πr^2

• 2πr

• πr

• r^2

What is the diameter of a circle?

• π

• 2r

• r

• r^2

What is the definition of the circumference of a circle?

• The "perimeter"

• The area inside

• 2r

• The diameter

What is the area of a circle with a radius of 2?

• 4π

• 4

• 2π

• 16π

What is the circumference of a circle with the radius of 5?

• 10π

• 5π

• π

• 3.14