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Dahasolnce [82]
4 years ago
5

Find the surface area of the equilateral triangular pyramid.

Mathematics
1 answer:
Mama L [17]4 years ago
4 0

 The area of the base is given by:
 A1 = (1/2) * (15) * (13)
 A1 = 97.5
 The area of the lateral faces is given by:
 A2 = (1/2) * (15) * (10)
 A2 = 75
 Then, the total surface area is:
 A = A1 + 3A2
 Substituting values:
 A = 97.5 + 3 * (75)
 A = 322.5
 Answer:
 
The surface area of the equilateral triangular pyramid is:
 
C) 322.5 in2
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