In a right pyramid the apex is directly above the centroid of the base - whatever shape that is. One consequence is each of the faces, other than the base, are isosceles (or equilateral) triangles.
The answer will depend on the area of the base, whether or not it is a right pyramid, and its height.
It does not have to have any. If it is a right pyramid, it will have 2 pairs.
The longer of the sides forming the rectangular base of the pyramid.
No but a right angle triangle does
A trapezium or a triangle. If the pyramid is a right pyramid then they would both be isosceles.
You got it right, "pyramid!"
There are no right angles (90 degrees) in a hexagonal pyramid.
No but a right angle triangle does
A pyramid could have any number of right angles between, and inlcuding, none and 8.
It does not have to have any. If it is a right pyramid, it will have 2 pairs.
The answer will depend on the area of the base, whether or not it is a right pyramid, and its height.
The longer of the sides forming the rectangular base of the pyramid.
A regular pyramid is a right pyramid whose base is a regular polygon. There are only three regular pyramids: a regular tetrahedron, a regular square pyramid, and a regular pentagonal pyramid.
No but a right angle triangle does
A trapezium or a triangle. If the pyramid is a right pyramid then they would both be isosceles.
A pyramid has 6 angles, 8 faces, and 6 edges. Is that right?
If it is a right pyramid then four, otherwise one or none.