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.
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.
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.