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.
There are different types of Angle Pairs. If the sum of the two angle measurement is equal to 90 degree, it is called as complementary angles. Any one of them in complementary angles is said to be the complement of the other angles. Example of complementary angle is shown below.