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What is the area of a circle with a diameter of 18mm in terms of pi

User Blackhole
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Final answer:

The area of a circle with a diameter of 18mm in terms of pi is 81π mm². This is derived using the formula A = πr² and taking half of the diameter as the radius (9mm).

Step-by-step explanation:

The area of a circle with a diameter of 18mm in terms of pi can be found using the area formula A = πr², where r is the radius of the circle. Since the diameter is 18 mm, the radius (r) is half of that which is 9 mm. Substituting r into the formula, we get

A = π(9 mm)²

which simplifies to

A = 81π mm²

This represents the area in terms of pi since we are not calculating an approximate value by substituting π with 3.14 or using any numerical approximation for pi.

User Navin Bista
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