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Circles Quiz

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Questions and Answers

What is the formula for finding the circumference of a circle?

2 * π * r (correct)

2 * π / r

2 * r

π * r^2

What is the relationship between the diameter and the radius of a circle?

The diameter is half the length of the radius

The diameter is the same as the radius

The diameter is three times the length of the radius

The diameter is twice the length of the radius (correct)

What is the area of a circle with radius 'r'?

2 * r

2 * π * r

π * r^2 (correct)

r^2

Study Notes

Circle Formulas

The formula for finding the circumference of a circle is C = 2πr, where C is the circumference and r is the radius.
The diameter of a circle is equal to twice the radius, represented as d = 2r.
The area of a circle with radius 'r' is A = πr², where A is the area.

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Description

Test your knowledge of circles with this quiz! Explore the formula for finding the circumference of a circle, understand the relationship between the diameter and radius, and calculate the area of a circle with radius 'r'.