Question

Question 8

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

Answer 1

268.3 cm³

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