If a triangular based pyramid has any right angles it has three. (Think of the corner of a cube). There are many triangular based pyramids that do not have any right angles.
8
5
four
4
A square pyramid has the base of a square,and sides of a triangle. While a triangle pyramid has the base and sides of a triangle.
four triangle faces.
a triangle- based pyramid has 4 faces
IT has got 5 coner.
four
four
12