Answer:
see explanation
Step-by-step explanation:
the equation of a circle centred at the origin is
x² + y² = r² ( r is the radius )
(1)
x² + y² = 196 ← is in this form
with centre = (0, 0 ) and r = [tex]\sqrt{196}[/tex] = 14
(2)
x² + y² = 100 ← is in this form
with centre = (0, 0 ) and r = [tex]\sqrt{100}[/tex] = 10
