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Find the surface area of the regular pyramids. Round your answer to the nearest tenth.

Find the surface area of the regular pyramids. Round your answer to the nearest tenth-example-1
User Luchko
by
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1 Answer

4 votes

Answer:

S.A = 147.35 cm²

Explanation:

Surface area of the triangular pyramid = base area + ½(perimeter of base*slant height)

Base area = ½*bh

b = 7 cm

h = 6.1 cm

Base area = ½*7*6.1 = 21.35 cm²

Perimeter of triangular base = 7 + 7 + 7 = 21 cm

slant height = 12 cm

Plug in the values into the equation

S.A = 21.35 + ½(21*12)

S.A = 21.35 + 126

S.A = 147.35 cm²

User Srm
by
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