both complementary and supplementary angles amongst the three angles passed. * Two angles are complementary if their sum is exactly 90 degrees; two angles * are supplementary if their sum is exactly ...

The pair in the middle does not show an angle because the lines do not touch. You can check whether an angle is a right angle by using a set square, like in the picture below. So, three right ...

A rectangle has two pairs of equal sides. It has four right angles (90°). The opposite sides are parallel. The diagonals bisect each other. A parallelogram has two pairs of equal sides.