## Posts Tagged ‘radius of the circle’

## Problem 1120

What is the radius of the circle

(x + 16)^{2} + (y – 8)^{2} = 16 ?

**Solution:-**

The radius of a circle is the r-value from the equation (x – h)^{2} + (y – k)^{2} = r^{2 }.

The radius of a circle is (4).

## Problem 484

Write the equation of a circle with a center at (-4, 2) and a radius of 5.

**Solution:-**

Use the general formula (x – h)^{2} + (y – k)^{2} = r^{2}

Where (h , k) center of the circle and r is radius .

(x + 4)^{2} + (y – 2)^{2} = 25