1 Fasteners can hold 2-thick stacks of paperwork securely inside the folder for instant flip-through. 2  Classification folders help you subdivide and identify various sections of your documentation. 3  Dividers are made of 17-pt. 4  kraft for amazing durability.
Complementary angles are two angles with a sum of 90Âº. Supplementary angles are two angles with a sum of 180Âº. Vertical angles are two angles whose sides form two pairs of opposite rays. We can think of these as opposite angles formed by an X. The Lesson:
The two angles will change so that they always add to 180Â°. In the figure above, the two angles â  PQR and â  JKL are supplementary because they always add to 180Â°. Often the two angles are adjacent, in which case they form a linear pair like this: Similar in concept are complementary angles, which add up to 90Â°.