Question

X2 +y2 =49 r=___________________

Answer 1

Answer:

r = 7

Step-by-step explanation:

The equation of a circle centred at the origin is

x² + y² = r² ( where r is the radius )

x² + y² = 49 ← is in this form

with r² = 49 ⇒ r = $\sqrt{49}$ = 7