3/4 of a rotation or 270 degrees
It would be impossible. A trapezoid can't have three right angles. It would just make a rectangle.
a tetrahedron has 3 Right angles
No, if a trapezium had three right angles, it would mean the fourth angle would have to be 90 degrees. That would make it a square or a rectangle.
A pentagon with 3 right angles is considered to be an irregular pentagon because not all angles and all sides are equal.
no, because three right angles don't even make a square...
You can make a four sided shape with 3 right angles, but it must have another right angle, too. So technically, yes.
The simplest shape that can have 2 right angles is a rectangle or a square. You can make an unlimited number of more complex shapes, though. A house shape is a pentagon with 2 right angles--you could even make it with 3 right angles.
3/4 of a rotation or 270 degrees
It would be impossible. A trapezoid can't have three right angles. It would just make a rectangle.
Yes, a trapezoid can have 3 right angles.
3
you cannot make a regular shape which has 3 right angles only, you will always end up with 4 right angles
no. if you have 3 right angles it is impossible to not have a 4th right angle which would then be a square
12 right angles.
3 right angles.
a tetrahedron has 3 Right angles