Question

The diameter of a circle is 13 cm. Find its area to the nearest tenth.

Answer 1

Area=$\pi$ $r^{2}$

divide diameter with 2 to get radius 13/2= 6.5

area= pi 6.5x6.5

=$\pi$42.25

answer= 42.25$\pi$

Answer 2

Area of a circle is equal to $\boldsymbol{132.8}$ square inches.

Area of a circle

A circle is a collection of all the points that are at the fixed distance (radius) from a fixed point (center).

Diameter of a circle $=\boldsymbol{13}$ centimeter

Radius of a circle is half of the diameter.

So,

Radius of a circle $=\frac{13}{2}$ centimeter

Area of a circle $=\boldsymbol{\pi r^2}$ where $r$ denotes radius of a circle.

                         $=\frac{22}{7}\times \left ( \frac{13}{2} \right )^{2}\\=132.7857$

                         $\boldsymbol{\approx 132.8}$ square inches

So, area of a circle is equal to $\boldsymbol{132.8}$ square inches.

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