sirens48
sirens48 sirens48
  • 02-01-2018
  • Mathematics
contestada

A circle has an area of 324π cm2. What is the radius?
a.
18 cm
c.
18π cm
b.
36π cm
d.
36 cm

Respuesta :

musiclover10045
musiclover10045 musiclover10045
  • 02-01-2018

area of a circle = PI*r^2

324PI = PI*r^2

divide both sides by PI

324 = r^2

r = sqrt(324)

r = 18

 Answer is A 18 cm

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