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dangina [55]
3 years ago
13

Find the surface area of a hemisphere with a diameter of 26 cm. Round your answer to the nearest tenth.

Mathematics
1 answer:
Katarina [22]3 years ago
4 0
The surface area of a sphere is 4 \pi  r^{2}.

Hence, the surface area of a hemisphere is half that, 2 \pi  r^{2}.

If the base is also included then the surface area will be 3 \pi  r^{2}.

Given,

Diameter = 26 cm

Therefore, Radius = \frac{26}{2} = 13 cm

Thus, 

Area = 3 *  \pi *  13^{2} = 3 * \pi * 169 = 507 \pi = = 1592.8 cm^{2} [approx.]
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