# math

posted by
**Pyramid**
.

Find the angle in degree between adjacent sides of the pyramid PQRS. P(4,0,0), Q (4,4,0), R(0, 4,0), S (2, 2, 9). The base of the pyramid is not considered a side.

posted by
**Pyramid**
.

Find the angle in degree between adjacent sides of the pyramid PQRS. P(4,0,0), Q (4,4,0), R(0, 4,0), S (2, 2, 9). The base of the pyramid is not considered a side.