Study Guide - Area with Circles

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

• radius

• diameter

• area

• circumference

If the radius of a circle is 8 cm, the diameter is 16 cm.

• TRUE

• FALSE

A circle has a diameter of 36 ft. What is the radius?

• 18

• 72

• 14

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

• Radius
• Diameter

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

• Radius
• Diameter

What does "circumference" mean?

• Space a circle takes up
• Distance around a circle
• Line from one side of a circle to another
• Line from center of circle to side

what is this shape called

• circle

• semi circle

• moon

• triangle

what is the formula for finding area of a circle

• C = π r²

• A = π r²

• A = π r² / 2

• C = 2 π r

The definition of a circle is

• set of all points in a plain that are the same distance from a point called the center

• the distance around a share

• a large figure

• a pizza, orange, plum, or watermelon

How do you find the area of a triangle?

• base x height

• take half of the base times the height

• add up all of the sides