Circumference from Diameter (Level 1)

This math topic focuses on calculating the circumference of a circle given its diameter. It encourages practicing the formula for circumference, \(C = \pi \times \text{diameter}\), using an approximate value for π (a bit more than 3), which simplifies the calculation without a calculator. It covers basic to intermediate problems, teaching students to accurately apply the formula and understand the relationship between diameter and circumference. The outlined problems show varying levels of difficulty and multiple-choice answers to encourage self-assessment and reinforcement of the concept.

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 1)'. 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

4.5

b

28.27

c

3

d

9.42

e

7.07

f

4.71

2

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

a

7

b

11

c

21.99

d

24.5

e

38.48

f

34.56

3

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

a

34.56

b

5

c

15.71

d

7.85

e

12.5

f

19.63

4

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

a

31.42

b

6.28

c

18.85

d

8

e

12.57

f

4

5

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

a

38.48

b

24.5

c

34.56

d

11

e

21.99

f

40.84

6

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

a

19.63

b

40.84

c

12.5

d

15.71

e

5

f

21.99

7

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

a

25.13

b

32

c

12.57

d

31.42

e

50.27

f

8