Question

The circle passes through the point (−2, 3) with a center of (-4,6). What is its radius?

Answer 1

radius = √13

Explanation:

Forming the equation :

(x - h)² + (y - k)² = r²

• (x, y) = point on circle
• (h, k) = center of circle
• r = radius

Solving :

• (-2 + 4)² + (3 - 6)² = r²
• r² = 4 + 9
• radius = √13