Page 89 - Math Course 1 (Book 2)

Geometry: Angles

B. Measure ∠TYU and classify it as right, acute, or
obtuse. Measure ∠DZX and classify it as right, acute, or
obtuse.

A. 30°, acute
B. 30°, obtuse
C. 150°, acute
D. 150°, obtuse

Use protractor to Answer
f nd m∠TYU = 45

45 < 90, so ∠TYU Is an acute
Answer
angle. MO. 9 - L4c

Congruent Angles
Your Turn!

Measure and Classify Angles
Vocabulary A-Z
Let us learn some vocabulary

angle bisector
A ray that divides an angle into two congruent
angles is called an angle bisector.

R Q

Measure ∠CZD and classify it as right, acute, or
obtuse.
S
A. 30°, acute P
B. 30°, obtuse →
PQ is the angle bisectors of ∠RPS
C. 150°, acute
D. 150°, obtuse
Key Concept Angle
Answer
Words Angles that have the same measure are
congruent angles. Arcs on the f gure
Measure ∠CZE and classify it as right, acute, or indicate which angles are congruent.
obtuse.
Symbols ∠NMP ≌ ∠QMR
Model N
A. 60°, acute
B. 90°, acute 25° M
C. 90°, right P
R
D. 90°, obtuse
Q 25°
Answer

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