If a circle has a diameter of 5.6 inches. What is the area of the circle in square inches rounded to the nearest tenth inch?

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Answer 1 · 2018-04-24T08:09:55

$A = 24.6 {inches}^{2}$ $A = 24.6 " inches"^2$

To find the area of a circle, you use the formula:

$A = π r^{2}$ $A = pi r^2$

We are given the diameter. Divide by $2$ $2$ to find the radius.

$5.6 \div 2 = 2.8$ $5.6 div 2 = 2.8$ inches

$A = π \times {2.8}^{2}$ $A = pi xx2.8^2$

$A = 24.63 {inches}^{2}$ $A= 24.63 " inches"^2$

Rounded to the nearest tenth of an inch is the same as $1$ $1$ decimal place.

$A = 24.6 {inches}^{2}$ $A = 24.6 " inches"^2$

For $π$ $pi$ you can use the value on a calculator, or $\frac{22}{7} or 3.142$ $22/7 or 3.142$