Radius and Circle

A cruise ship has a large, circular window. It has a diameter of 6 meters. What is the window's approximate circumference?

• 3 m 

• 9.42 m

• 12 m

• 18.84 m

Is the red line a radius or diameter of the circle?

• Radius

• Diameter

If the radius of a circle is 4 inches, what is the diameter?

• 2 inches

• 2 feet

• 4 inches

• 8 inches

Is the red line a radius or diameter of the circle?

• Radius

• Diameter

What is the diameter of this circle?

• 6 m

• 6 cm

• 24 cm

• 24 m

• 6

• 8

• 4

• 16

In the equation (x + 2)² + (y - 3)² = 4, the radius of the circle is...

• 4

• 2

• 3

• 16

In the equation (x-3)²+(y-2)²=16, the center of the circle is...

• (3,2)

• (-3, -2)

• (-2, -3)

• (2, 3)

In the equation (x-3)²+(y-2)²=16, the radius of the circle is...

• 16

• 32

• 3

• 4

See Picture

• A

• B

• C