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horrorfan [7]
3 years ago
12

Question 8 Find the surface area of the equilateral triangular pryamid. 15 cm 10 cm

Mathematics
1 answer:
Elena-2011 [213]3 years ago
4 0

Answer:

268.3 cm³

Step-by-step explanation:

Surface area of triangular pyramid = Base Area + ½*(perimeter of base)(height of pyramid)

Base area = 43.3 cm²

Perimeter of base = 10 + 10 + 10 = 30 cm

Height of pyramid = 15 cm

Plug in the values

Surface area = 43.3 + ½(30)(15)

Surface area = 43.3 + 225

= 268.3 cm³

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