The area of a circle is 200 square inches. What is approximate measure of its radius?

Use 3.14 for π. Round to the nearest whole number...

1 answer

To find the radius of the circle when given the area, we can use the formula for the area of a circle:

\[ A = \pi r^2 \]

Given that the area \( A \) is 200 square inches and using \( \pi \approx 3.14 \), we can set up the equation:

\[ 200 = 3.14 r^2 \]

To solve for \( r^2 \), we first divide both sides by \( 3.14 \):

\[ r^2 = \frac{200}{3.14} \]

Calculating the right side:

\[ r^2 \approx \frac{200}{3.14} \approx 63.69 \]

Now, we take the square root of both sides to find \( r \):

\[ r \approx \sqrt{63.69} \approx 7.98 \]

Rounding to the nearest whole number, we find:

\[ r \approx 8 \]

Thus, the approximate measure of the radius is \( \boxed{8} \) inches.