Mensurationhard · Past Paper
The total surface area of a prism with an equilateral triangular base of side 'a' and height 'h' is:
A3ah + (sqrt(3)/4)a²
B3ah + (sqrt(3)/2)a²
Cah + (sqrt(3)/4)a²
D2ah + (sqrt(3)/2)a²
✓ Correct Answer: B — 3ah + (sqrt(3)/2)a²
TSA = LSA + 2 * Base Area = (3a)h + 2 * (sqrt(3)/4)a² = 3ah + (sqrt(3)/2)a².
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