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julio bisects angle PQR and labels a point on the bisector as S. He measures angle PQS with a protractor. The measure of angle PQS is 37 degrees. What is the measure of angle PQR?

User HLGEM
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1 Answer

2 votes

Answer:

The measure of angle PQR is 74 degrees

Explanation:

* Lets explain how to solve the problem

- Bisect an angle means divide the angle into two equal parts in

measures

- Ex: If angle ABC is bisected by a ray BD then:

- Angle ABC is divided into two equal parts in measure

m∠ABD = m∠CBD and

m∠ABC = m∠ABD + m∠CBD

- So we can say measure of angle ABC is twice measure of angle

ABD or twice measure of angle CBD

* Lets solve the problem

- Julio bisects angle PQR and labels a point on the bisector as S

∴ m∠PQS = m∠RQS

∴ m∠PQR = m∠PQS + m∠RQS

∴ m∠PQR = 2 m∠PQS ⇒ (or 2 m∠RQS)

- He measures angle PQS with a protractor and find its measure is

37 degrees

∵ m∠PQS = 37°

∴ m∠PQR = 2 × m∠PQS

∴ m∠PQR = 2 × 37 = 74°

The measure of angle PQR is 74 degrees

User Auser
by
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