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the diameter of a circle is 18 m. find its area in terms of π.
answer attempt 1 out of 2
a = m² submit answer
π

Explanation:

Step1: Find the radius

The radius \( r \) of a circle is half of the diameter \( d \). Given \( d = 18\) m, so \( r=\frac{d}{2}=\frac{18}{2}=9\) m.

Step2: Calculate the area

The formula for the area \( A \) of a circle is \( A=\pi r^{2}\). Substitute \( r = 9\) into the formula: \( A=\pi\times(9)^{2}=\pi\times81 = 81\pi\) \(m^{2}\).

Answer:

\(81\pi\)