Viewing in Doors & Windows. Many people use a screwdriver to remove a hinge pin when taking off a door. They simply place the tip up under the head of the pin and then tap on the end with a hammer.
Complementary angles are two angles whose measures add up to 90 degrees. You can think of them as two puzzle pieces that form one 90 degree angle when they are put together. When talking about complementary angles, it's important to remember that they're always in a pair.
Top. In the family of special angles in Geometry, we come across many angles beside acute, obtuse, right, straight and other. In special angle, we will study about supplementary and complementary angles. Moreover vertical opposite angles, adjacent angles, interior and exterior all comes in the category of special angles. Complementary Angles: If the sum of two angles formed is 90 degrees, which means that if we add together two angles, we get the pair of Perpendicular Lines, then they are called complementary angles.