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If a circle has a radius of 4 units, what is its circumference?
Practice Questions
Q1
If a circle has a radius of 4 units, what is its circumference?
8π units
16π units
12π units
20π units
Questions & Step-by-Step Solutions
If a circle has a radius of 4 units, what is its circumference?
Steps
Concepts
Step 1: Understand that the circumference of a circle is the distance around it.
Step 2: Know the formula for circumference, which is C = 2πr, where r is the radius.
Step 3: Identify the radius of the circle, which is given as 4 units.
Step 4: Substitute the radius into the formula: C = 2π * 4.
Step 5: Calculate the multiplication: 2 * 4 = 8.
Step 6: Write the final answer: C = 8π units.
Circumference of a Circle
– The circumference is the distance around a circle, calculated using the formula C = 2πr, where r is the radius.
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