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.
Complementary angles - Two angles are complementary if they add up to 90Â°. Corresponding angles - When two lines (usually parallel) are crossed by another (called the transversal) the angles in the same corners of each line are called corresponding angles.