Circles Concepts

If the area of a circle is 25 π in² , then what is the length of the diameter?

• 10 in

• 5 in

• 25 in

• pi in

The _____ is the distance from the center to any point on the circle.

• diameter

• radius

• π

• center

The distance across a circle through its center is called the _____.

• diameter

• radius

• π

• center

A _____ is half of a circle.

• circumference

• pi

• semicircle

•  composite figure

Which segment is the diameter?

• segment AC

• segment BD

• segment LM

• segment CE

Which segment is a radius?

• segment LM

• segment DC

• segment BD

• segment AL

The definition of a circle is

• set of all points in a plane that have the same distance from a fixed point called the center

• the union of two non-collinear rays with a common endpoint

• a figure with equal angles and equal sides

• a pizza, orange, plum, or watermelon

The definition of circumference is

• distance from the center of any point on the circle

• distance from one point to another

• distance around the circle

• distance from the center of any point on the 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

Shring's dining room table is round and has a radius of 4.5 feet. What is the tabletop's area?

• 63.585 ft²

• 68.345 ft²

• 64.585 ft²

• 61.345 ft²