![a supplementary angle a supplementary angle](https://us-static.z-dn.net/files/d66/1cd63d9ada8ae60e96e98fba0dddccec.png)
Supplementary angles can be adjacent or nonadjacent. Each angle is the supplement of the other. Here are some resources you may like for teaching angles: Supplementary angles are two angles whose measures have a sum of 180. The “S” in supplementary stands for “Straight” like a line. Two angles whose sum is 90 (that is, one right angle) are called complementary angles and one is called the complement of the other. The “C” in complementary stands for “Corner” like a right angle. This “trick” really helped my students! I would see them write out C and S on their test and change the letters to 9 and 8! Another Helpful TrickĪnother way to help students remember the difference between complementary and supplementary angles is this: To help students remember the difference between complementary and supplementary angles, I taught them this quick trick.įor complementary, students can change the “C” to a “9” to help them remember 90°.įor supplementary, students can change the “S” to an “8” to help them remember 180°. Trick for Remembering Complementary and Supplementary Angles With all these new terms, it might be difficult for students to remember even the most basic geometry terms. A common case is when they lie on the same side of a straight line. There are corresponding angles, consecutive angles, adjacent angles, alternate exterior angles, etc. Because each side of an angle has a supplementary angle, there are two exterior angles per vertex. Supplementary angles are two angles with a sum of 18 0 180 circ 180180, degrees. However, I started to think about all the new terms they learn in geometry.
![a supplementary angle a supplementary angle](https://i.ytimg.com/vi/H4pjMunasII/maxresdefault.jpg)
![a supplementary angle a supplementary angle](https://us-static.z-dn.net/files/dd5/500daa9ef1db150af240364147f61e37.png)
They should know these angles from their middle school math class. If any pair of angles sum comes out to be even a degree off than 180, say 179. When I taught high school, I was always surprised that my students would get these terms confused. When the sum of two angles is 180, the angles are called supplementary angles. Complementary and supplementary angles are a key part of any geometry curriculum.