There are two angles: one of 90 degrees and the other of 270 deg.
4 right angles, no other angles.
23 of them.
It has 6 angles, none of which are right angles.
0 right angles
A regular hexagon as no right angles. An irregular hexagon could have from none to as many as five right angles.
a tetrahedron has 3 Right angles
12 right angles.
A square has 4 right angles.
4 right angles
There are zero right angles in a trapizoid............
2 right angles
a square has 4 right angles.