A parallelogram with a right angle is a rectangle.
Yes, a rectangle is a special kind of parallelogram - one that has a right angle. (You can prove that if it has one right angle all angles are right.)
A rectangle is not an angle.
Each angle of a rectangle is a right angle. (90°)
A destroyed angle is called to as a rect-angle. It's a pun on the "wreck"tangle
Yes, a rectangle can have one obtuse angle.
A square is a special rectangle.
In general, trapezoids do not have right angles. In fact, a trapezoid with a right angle is a special case, called a rectangle.
Each angle of a rectangle is equal to the angle opposite.
Except for the special case of a rectangle, a parallelogram must have two acute angles.
Yes (or its special case, a square).