Circumference from Radius (with hint and calculator) (Level 2)

This math topic focuses on calculating the circumference of a circle using the formula \( C = 2\pi r \), where \( r \) is the radius of the circle. Each question provides a different radius and requires the learner to apply this formula to find the circumference. The problems are presented with multiple-choice answers, allowing learners to solve and then select the correct circumference from a list of options. This skill is part of an introductory unit on the geometry of circle circumferences.

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

Circumference from Radius (with hint and calculator) Worksheet

Math worksheet on 'Circumference from Radius (with hint and calculator) (Level 2)'. Part of a broader unit on 'Geometry - Circle Circumference - Intro' Learn online: app.mobius.academy/math/units/geometry_circles_perimeter_intro/

1

Find the circumference of the circle using the formula C = 2πr

a

16

b

62.83

c

56.55

d

201.06

e

128

f

50.27

2

Find the circumference of the circle using the formula C = 2πr

a

37.7

b

12

c

72

d

113.1

e

18.85

f

62.83

3

Find the circumference of the circle using the formula C = 2πr

a

81.68

b

18

c

56.55

d

162

e

28.27

f

62.83

4

Find the circumference of the circle using the formula C = 2πr

a

20

b

314.16

c

81.68

d

200

e

69.12

f

62.83

5

Find the circumference of the circle using the formula C = 2πr

a

201.06

b

16

c

75.4

d

25.13

e

128

f

50.27

6

Find the circumference of the circle using the formula C = 2πr

a

31.42

b

62.83

c

20

d

87.96

e

200

f

314.16

7

Find the circumference of the circle using the formula C = 2πr

a

21.99

b

14

c

153.94

d

69.12

e

98

f

43.98