Question

Find the length of the radius of the given circle. (x - 5)2 + (y + 3)2 = 25 5 12.5 25

Answer 1

radius = 5

Explanation:

The equation of a circle in standard form is

(x - h)² + (y - k)² = r²

where (h, k) are the coordinates of the centre and r is the radius

(x - 5)² + (y + 3)² = 25 ← is in standard form

with r² = 25 ⇒ r =
`√(25)` = 5