Answer:
4 in
Explanation:
The volume for a triangular pyramid is:
1/3AH = V
Let's first find the area of the base:
Area = 1/2bh = 1/2(12)(8)=48
Now we plug the area of the base and the volume back into the formula:
V = 1/3AH
64 = 1/3(48)(H)
64 = 16H
H = 4 in