Complementary and supplementary angles

The topic  appears under the 7th Grade Math Mission. This exercise introduces complementary and supplementary angles.

Types of Problems
There are two types of problems in this exercise:


 * 1) Find the complement to the given angle: This problem provides a picture with a right angle cut into two adjacent angles. One angle is given and the student is asked to find the measure of the other angle.Casa1.png
 * 2) Find the supplement to the given angle: This problem provides a picture with a straight angle cut into two adjacent angles. One angle is given and the student is asked to find the measure of the other angle.Casa2.png

Strategies
Knowledge of the vocabulary words complement and supplement are needed in addition to the arithmetic operation of subtraction.
 * 1) Complementary angles add up to 90 degrees. A right angle always measures 90 degrees.
 * 2) Supplementary angles add up to 180 degrees. A straight angle always measures 180 degrees.
 * 3) Since the numbers will always add up to 90 or 180 (multiples of ten) this is a problem where it is possible to practice the "missing addend" approach to subtraction.