Circumference - Equation to Radius (Level 1)

This math topic helps students practice finding the radius of a circle when provided with the circle's circumference. It involves direct application of the circumference formula \(C = 2\pi r\), requiring students to rearrange the formula to solve for the radius \(r\). The problems contain given values of the circumference, and students must select the correct radius from multiple choices. These tasks are designed to reinforce students' understanding of basic circle geometry and arithmetic skills.

Work on practice problems directly here, or download the printable pdf worksheet to practice offline.

Circumference - Equation to Radius Worksheet

Math worksheet on 'Circumference - Equation to Radius (Level 1)'. Part of a broader unit on 'Geometry - Circle Circumference - Intro' Learn online: app.mobius.academy/math/units/geometry_circles_perimeter_intro/

1

Given this equation for the circumference, what is the radius of this circle

a

r = 11

b

r = 10

c

r = 4

d

r = 8

e

r = 9

f

r = 13

2

Given this equation for the circumference, what is the radius of this circle

a

r = 7

b

r = 5

c

r = 12

d

r = 10

e

r = 14

f

r = 11

3

Given this equation for the circumference, what is the radius of this circle

a

r = 1

b

r = 4

c

r = 5

d

r = 0

e

r = 3

f

r = 2

4

Given this equation for the circumference, what is the radius of this circle

a

r = 1

b

r = 4

c

r = 6

d

r = 2

e

r = 10

f

r = 7

5

Given this equation for the circumference, what is the radius of this circle

a

r = 0

b

r = 5

c

r = 4

d

r = 6

e

r = 8

f

r = 1

6

Given this equation for the circumference, what is the radius of this circle

a

r = 11

b

r = 6

c

r = 7

d

r = 14

e

r = 9

f

r = 8

7

Given this equation for the circumference, what is the radius of this circle

a

r = 12

b

r = 15

c

r = 11

d

r = 8

e

r = 14

f

r = 7