Could someone help me with this?
A tetrahedron (not rectangular) has vertices at A, B, C, and D. The length of the altitude from A to the base (△BCD) measures 6 in. It is given that m∠BCD = 90°,
BC = 4 in.,
and CD = 9 in.
A tetrahedron has the following four triangular faces: △A B D, △A C D, △A B C, and △B C D. ∠C of △B C D is labeled as a right angle.
Find the volume (in cubic inches) of the pyramid.
Find the length (in inches) of the altitude from vertex D to the base (△ABC); note that AABC = 12 in2.