Do all shapes that have right angles have sides that are parallel.

Not all shapes, a right triangle does not have any parallel sides.

I hope this helped!

according to the triangle sum theorem, all the angles in a triangle must add up to 180 degrees. if we know one angle is already 90, we do 180-90=90. the other 2 angles must add up to 90, exactly.

step-by-step explanation:

one set of data has more variation than the other. hope this !