Question

Please help asap and include an explanation

find the lateral surface area of the triangular pyramid.

Answer 1

667.79

Explanation:

Multiply each triangle: 17.9 × 16.4 = 293.56 then divide that by 1/2 to get 147.78

Multiply that answer by 3 (for each triangle) to get 440.34

then multiply the middle: 15.5 × 17.9 =227.45 Lastly add all that up: 227.45 + 440.34 = 667.79