x = 10.8
Step-by-step explanation:
cos 26° = x/12
0.8988 = x/12
x = 10.785
v = 1/3 a^2h
step-by-step explanation:
if the height is 57.7cm and the height of the slant edge is 18.2cm, then the volume is 1/3 a^2h.