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.
Definition Adjacent angles are two angles that have a common vertex and a common side. The vertex of an angle is the endpoint of the rays that form the sides of the angle. When we say common vertex and common side, we mean that the vertex point and the side are shared by the two angles.