4
A right square based pyramid.
No, but a square pyramid does.
The answer will depend on the area of the base, whether or not it is a right pyramid, and its height.
A trapezium or a triangle. If the pyramid is a right pyramid then they would both be isosceles.
A right, square based pyramid.A right, square based pyramid.A right, square based pyramid.A right, square based pyramid.
No angles are larger than 90 degrees in a square based pyramid.
If it is a right pyramid then four, otherwise one or none.
There are no right angles in a square based pyramid, so Pythagoras and his theorem are not involved.
Yes - it has four around the base !
4
Just the one and it is the base face
Square-based pyramid.
A right square based pyramid.
Normally four but there could be six if the opposite edges at the apex met at right angles.
No, but a square pyramid does.
It depends on the dimensions of the base and the height (slant or vertical) of the pyramid.