Discover new knowledge and insights with IDNLearn.com's extensive Q&A database. Join our knowledgeable community to find the answers you need for any topic or issue.
Sagot :
Since ∠A and ∠B forms a straight line, ∠A and ∠B are a linear pair.
Linear pair:
A linear pair is the sum of two angles that forms a straight line (180°).
⇒ ∠A + ∠B = 180°
Measure of ∠A:
Subtract the measure of ∠B from 180 to determine the measure of ∠A.
⇒ ∠A = 180 - ∠B
Measure of ∠B:
Subtract the measure of ∠A from 180 to determine the measure of ∠B.
⇒ ∠B = 180 - ∠A
*Let us take a few examples to understand the concept better.
Example (Given measure of ∠B):
Let the measure of ∠B (In the triangle shown) be 105°.
What is the measure of ∠A?
Solution:
Substitute the measure of ∠B in the equation ∠A = 180 - ∠B:
- ⇒ ∠A = 180 - ∠B
- ⇒ ∠A = 180 - 105
Simplify the equation:
- ⇒ ∠A = 180 - 105
- ⇒ ∠A = 75°
Therefore, the measure of ∠A is 75°.
Example (Given measure of ∠A):
Let the measure of ∠A (In the triangle shown) be 60°.
What is the measure of ∠B?
Solution:
Substitute the measure of ∠A in the equation ∠B = 180 - ∠A:
- ⇒ ∠B = 180 - ∠A
- ⇒ ∠B = 180 - 60
Simplify the equation:
- ⇒ ∠B = 180 - 60
- ⇒ ∠B = 120°
Therefore, the measure of ∠B is 120°.
Learn more about linear pairs: https://brainly.com/question/26555759
Thank you for contributing to our discussion. Don't forget to check back for new answers. Keep asking, answering, and sharing useful information. Thank you for choosing IDNLearn.com. We’re committed to providing accurate answers, so visit us again soon.