Circumference and Area
of a Circle

Vocab

To begin finding the circumference of a circle you need to know the proper vocab used.

CIRCUMFERENCE-- the distance around a circle
DIAMETER-- a line segment that passes through the center of the circle from side to side
RADIUS-- a line segment that connects the center of the circle to the circle
PI-- the ratio of a circle's circumference C to its diameter d.

FINDING CIRCUMFERENCE

use the formula C=2(p)r

p=pi

To begin write the formula then replace p with 3.14 (do not use the pi button on your caculator!!!) then multiply the whole equation together

or in the event that you have the diameter only divide it by two then find the circumference.

FINDING THE AREA OF A CIRCLE

To find the area A of a circle use the formula
A=prĀ²

REMEMBER THAT p = PI

To begin write the formula then replace pi, then square the radius finally multiply the squared radius by 3.14

Find the area of this circle

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