This topic is about calculating the circumference of a circle given the radius, using the formula \(C = 2\pi r\). Each problem presents a specific circle with a radius and multiple choice answers for the calculated circumference. The math skill exercised here involves applying the formula correctly and understanding the properties of circles within basic geometry concepts.
Work on practice problems directly here, or download the printable pdf worksheet to practice offline.
Practice:
Circumference from Radius (with hint and calculator)
Complete these online problems with 80% or 4 correct answers in a row. Results are immediate.
Find the circumference of the circle using the formula C = 2πr
Circumference from Radius (with hint and calculator) Worksheet
| Math worksheet on 'Circumference from Radius (with hint and calculator) (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 of the circle using the formula C = 2πr |
a
| 25.13 |
b
| 50.27 |
c
| 43.98 |
d
| 12.57 |
e
| 31.42 |
f
| 8 |
2
| Find the circumference of the circle using the formula C = 2πr |
a
| 78.54 |
b
| 31.42 |
c
| 50 |
d
| 15.71 |
e
| 56.55 |
f
| 10 |
3
| Find the circumference of the circle using the formula C = 2πr |
a
| 8 |
b
| 43.98 |
c
| 25.13 |
d
| 31.42 |
e
| 50.27 |
f
| 12.57 |
4
| Find the circumference of the circle using the formula C = 2πr |
a
| 25.13 |
b
| 6.28 |
c
| 8 |
d
| 12.57 |
e
| 4 |
f
| 37.7 |
5
| Find the circumference of the circle using the formula C = 2πr |
a
| 6 |
b
| 37.7 |
c
| 18 |
d
| 28.27 |
e
| 18.85 |
f
| 43.98 |
6
| Find the circumference of the circle using the formula C = 2πr |
a
| 15.71 |
b
| 10 |
c
| 31.42 |
d
| 50 |
e
| 43.98 |
f
| 78.54 |
7
| Find the circumference of the circle using the formula C = 2πr |
a
| 12.57 |
b
| 25.13 |
c
| 31.42 |
d
| 6.28 |
e
| 2 |
f
| 3.14 |