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Circumference - Radius to Equation (Level 1)

This math topic focuses on practicing how to find the circumference of a circle given its radius. It enables students to apply the formula for the circumference of a circle, which is typically \( C = 2\pi r \), where \( C \) is the circumference and \( r \) is the radius. Learners are presented with various circles, each accompanied by multiple-choice answers that represent different equations for the circumference. This includes correctly applying the formula as well as avoiding common misconceptions or calculation errors.

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

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Circumference - Radius to Equation

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Find the equation that represents the circumference of this circle

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Circumference - Radius to Equation Worksheet

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Math worksheet on 'Circumference - Radius to Equation (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 equation that represents the circumference of this circle
An svg image showing a math problem
a A LaTex expression showing C = Pi times 3
b A LaTex expression showing C = Pi over 5
c A LaTex expression showing C = Pi times (9 over 2 ) to the power of 2
d A LaTex expression showing C = Pi times 6
e A LaTex expression showing C = Pi over 3
f A LaTex expression showing C = 2 times Pi times 5
2
Find the equation that represents the circumference of this circle
An svg image showing a math problem
a A LaTex expression showing C = Pi times 2 to the power of 2
b A LaTex expression showing C = 2 times Pi times 4
c A LaTex expression showing C = Pi times 6 to the power of 2
d A LaTex expression showing C = Pi over 4
e A LaTex expression showing C = Pi times (2 over 2 ) to the power of 2
f A LaTex expression showing C = Pi over 2
3
Find the equation that represents the circumference of this circle
An svg image showing a math problem
a A LaTex expression showing C = 2 times Pi times 11
b A LaTex expression showing C = Pi times 15
c A LaTex expression showing C = Pi times (7 over 2 ) to the power of 2
d A LaTex expression showing C = Pi times 7
e A LaTex expression showing C = Pi over 9
f A LaTex expression showing C = Pi times 6 to the power of 2
4
Find the equation that represents the circumference of this circle
An svg image showing a math problem
a A LaTex expression showing C = Pi times 12
b A LaTex expression showing C = 2 times Pi times 12
c A LaTex expression showing C = Pi times 15 to the power of 2
d A LaTex expression showing C = Pi over 12
e A LaTex expression showing C = Pi times 16 to the power of 2
f A LaTex expression showing C = Pi times 12 to the power of 2
5
Find the equation that represents the circumference of this circle
An svg image showing a math problem
a A LaTex expression showing C = Pi times 7 to the power of 2
b A LaTex expression showing C = Pi times 2
c A LaTex expression showing C = Pi over 7
d A LaTex expression showing C = 2 times Pi times 7
e A LaTex expression showing C = Pi times (8 over 2 ) to the power of 2
f A LaTex expression showing C = Pi times 3
6
Find the equation that represents the circumference of this circle
An svg image showing a math problem
a A LaTex expression showing C = Pi times 13 to the power of 2
b A LaTex expression showing C = Pi times 7
c A LaTex expression showing C = Pi times 7 to the power of 2
d A LaTex expression showing C = Pi over 13
e A LaTex expression showing C = Pi times 13
f A LaTex expression showing C = 2 times Pi times 13
7
Find the equation that represents the circumference of this circle
An svg image showing a math problem
a A LaTex expression showing C = Pi times 1
b A LaTex expression showing C = 2 times Pi times 6
c A LaTex expression showing C = Pi over 3
d A LaTex expression showing C = Pi over 6
e A LaTex expression showing C = Pi times (5 over 2 ) to the power of 2
f A LaTex expression showing C = Pi times 3