radius = 9
Answer:
56.55 units
Circle with radius 9 units
Identify the formula for circumference of a circle
Substitute the radius
Multiply
Final answer
C = 2πr
This formula calculates the perimeter of a circle.
A circular track with 9 meter radius has a 56.55 meter circumference
A wheel with 9 inch radius travels 56.55 inches per revolution
The perimeter of a circle is a fundamental concept in geometry. Perimeter measures the total distance around the outside of a 2D shape, expressed in linear units.
By using the formula C = 2πr, we can quickly and accurately calculate the perimeter for any circle when we know the required measurements.
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