Reteaching: Triangle Angle Sum Theorem
Part 1: Exploration
Interact with the app below for a few minutes.
Be sure to change the locations of this triangle's vertices each time before you drag the slider!
After interacting with the app above, what do you notice?
Part 2: Lesson
Triangle sum theorem:
The sum of the interior angle measures of a triangle is 180 degrees.
Let's talk about the following problem together.
- Find the measure of angle C.
- Check your answer by seeing if the 3 angles measures add up to 180 degrees.
Let's try the following problem together.
- Find the value of x.
- Check your answer by seeing if the 3 angles measures add up to 180 degrees.
Part 3: Independent Practice
Try the following problem by yourself.
- Find the value of x.
- Check your answer by seeing if the 3 angles measures add up to 180 degrees.