Circles Practice

Label the parts of a circle.

a

b

c

d

e

radius

circumference

pi

diameter

3.14

Sort the following into the correct category. You will need a picture, formula, and description.

Groups:

(a) Diameter

,

(b) Radius

• half line segment

• full line segment

• 
• 

Tags

CCSS.7.G.B.4

Show the connection between radius and diameter with the following matches.

• 3.5

• 
• 31.6

• 
• 20

• 
• 7.5

• 
• 5.2

• 

Tags

CCSS.HSG.C.A.2

Pi, π, is the relationship between the circumference of a circle and its number. It is represented by the number:

Tags

CCSS.HSG.GMD.A.1

Pi is can be found by dividing the (a)   of a circle by it's ​ (b)   to get the number ​ (c)   .

• circumference
• diameter
• 3.14
• radius
• area
• perimeter
• 2.71
• 4

Tags

CCSS.7.G.B.4

Determine the circumference of the circle.

Round your answer to the nearest tenth.

Mathematical Equivalence

OFF

Tags

CCSS.7.G.B.4

The average diameter of a merry go round is 9.8ft. Determine the distance traveled around the outside of the circle, circumference, if the merry go round travels around 4 times. Round answer to the nearest hundredth.

Mathematical Equivalence

OFF

Tags

CCSS.7.G.B.4

A circle has a circumference of 56.52 cm. What is the diameter of the circle to the nearest centimeter?

Tags

CCSS.7.G.B.4

Which formula can be used to find the area of a circle?

• πr²

• 2πr

• πd

• πd²

Tags

CCSS.7.G.B.4

When determining the area of a circle, you use the formula A=πr². The r² means radius X ​ (a)   . ​

• radius
• diameter
• two

Tags

CCSS.7.G.B.4