four
There are no right angles (90 degrees) in a hexagonal pyramid.
a square pyramid has 4 triangles
A pyramid could have any number of right angles between, and inlcuding, none and 8.
There are no right angles in a square based pyramid, so Pythagoras and his theorem are not involved.
A square pyramid has 16 angles.
A square based pyramid has 12 angles
20 angles
5 angles
One
No angles are larger than 90 degrees in a square based pyramid.
4
No, but a square pyramid does.
It's has all acute angles
angels are a fictional creature. you mean angles.
Just the one and it is the base face
A lot of things. For example, a cube has 8 vertices, the square pyramid has 5. A cube also has more edges and faces than the pyramid. All the faces of the cube are squares, while the pyramid only has one square face. Also, all the angles in the cube are right angles, while the angles in a square pyramid (in the usual sense of a pyramid where the apex is directly above the center of the base) are acute. In any case, they are not all right angles.