# Grade 9 Math: Intro to Geometry Surface Area of a Sphere

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### We have a sphere where the radius is 15cm . What is the surface area?

2827.43cm$$^2$$
1791.11cm$$^2$$
3218.23cm$$^2$$
2434.88cm$$^2$$

### We have a sphere where the radius is 8cm . What is the surface area?

712.23cm$$^2$$
804.25cm$$^2$$
402.12cm$$^2$$
679.56cm$$^2$$

### We have a sphere where the diameter is 20cm . What is the surface area?

1256.64cm$$^2$$
1121.96cm$$^2$$
1489.02cm$$^2$$
1345.19cm$$^2$$
412.52cm$$^2$$
512.85cm$$^2$$
647.02cm$$^2$$
333.33cm$$^2$$