Circumference from Diameter (Level 2)

This math topic focuses on calculating the circumference of a circle given the diameter, aimed at introductory learning in circle geometry. It presents multiple problems that require using an approximation for π (slightly more than 3) to manually calculate the circumference from provided diameters. The structure indicates different choices for each question, encouraging the understanding of how diameter influences the circle's circumference.

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

Circumference from Diameter Worksheet

Math worksheet on 'Circumference from Diameter (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 without using a calculator. Remember that π is just a bit more than 3.

a

220.5

b

72.26

c

78.54

d

21

e

65.97

f

346.36

2

Find the circumference without using a calculator. Remember that π is just a bit more than 3.

a

47.12

b

23.56

c

15

d

176.71

e

53.41

f

112.5

3

Find the circumference without using a calculator. Remember that π is just a bit more than 3.

a

314.16

b

20

c

31.42

d

200

e

62.83

f

87.96

4

Find the circumference without using a calculator. Remember that π is just a bit more than 3.

a

18

b

56.55

c

81.68

d

162

e

254.47

f

28.27

5

Find the circumference without using a calculator. Remember that π is just a bit more than 3.

a

21

b

32.99

c

220.5

d

346.36

e

91.11

f

65.97

6

Find the circumference without using a calculator. Remember that π is just a bit more than 3.

a

14

b

69.12

c

21.99

d

98

e

153.94

f

43.98

7

Find the circumference without using a calculator. Remember that π is just a bit more than 3.

a

28.27

b

62.83

c

162

d

18

e

56.55

f

254.47