Question

Approximate the volume of the regular triangular pyramid in previous problem (base edges of length 12, slant height of 12, and surface area 278.35) if the height is approximately 11.5

(Hint : Remember that the base of a regular triangular pyramid must be an equilateral triangle, not necessarily congruent to the sides of the pyramid.)

a) 828
b) 717
c) 239
d) 276

**I originally answered d) 276 and it said it's wrong**