Remember the trip to the art museum? Well, in the last Concept, you practiced identifying different types of angles in the stained glass. Now the students are going to need to identify angle pairs. These angle pairs can also be found in the stained glass. Here is the stained glass once again.
In this Concept, you will learn all about angle pairs. Pay close attention and you will be able to find these pairs at the end of the Concept.
When we have two angles together, we can say that we have angle pairs. Sometimes, the measures of these angles add up to form a special relationship. Sometimes they don’t. There are two special angle pair relationships for you to learn about. The first one is called complementary angles and the second one is called supplementary angles.
Let’s practice classifying some pairs of angles.
Classify the following pairs of angles as either complementary or supplementary.
Now it's your turn to try a few. Identify the angle pairs as complementary, supplementary or neither.
Now that you have learned about angle pairs. Look at the stained glass once again.
Write down or draw a copy of the stained glass in your notebook. Then identify the angle pairs that you can find. When you have done this, discuss your findings with a friend.
Here are the vocabulary words in this Concept.
an angle whose measure is less than 90∘
an angle whose measure is greater than 90∘
an angle whose measure is equal to 90∘
an angle whose measure is equal to 180∘
how an angle is measured
when the measures of two angles are added together to form a special relationship
angle pairs whose sum is 180∘
angle pairs whose sum is 90∘
Here is one for you to try on your own.
Here is a video for review.
- This is a James Sousa video on the types of angles.
Directions: Identify whether the pairs below are complementary or supplementary or neither.