Answer
39.4 in$^3$
Work Step by Step
Since the hexagonal pyramid has plane symmetry across plane GAD, its volume would be twice that of the pyramid with base ABCD and vertex G.
V=2(19.7)
V=39.4
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.