Expectation
Identify the parts of and
appropriately label angles.
Find the measure of and identify the
type of angles.
Find unknown angle measurements
using the Angle Addition Postulate.
Meets
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Almost Meets
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Teacher Comment

MEASURING AND CLASSIFYING ANGLES

Find the measure of the angle. Then classify the angle.

Create an angle based on the given measurement.
(1)
m∠ABC = 76°
(2)
m∠JKL = 103°
(3)
m∠RST = 90°
(4)
m∠VWX = 175°

(1)
In the coordinate plane, plot the points and sketch ∠ABC. List the coordinates of a
point that lies in the exterior of the angle and list the coordinates of a point that lies
in the interior of the angle.
A: (–5, –4)
B: (–3, 0)
C: (1, –4)
(2)
A: (–5, 0)
B: (–1, –4)
C: (4, 2)
Exterior Point:
Exterior Point:
Interior Point:
Interior Point:

Use the Angle Addition Postulate to find the missing angle measurement.
(1)
m∠CDF = __________
(2)
m∠PQR = __________

(3)
(4)
(5)
Find the value of x and the unknown measurements.
(6)
Q is in the interior of ∠ROS . S is in the interior of ∠QOP . P is in the interior of
∠SOT . m∠ROT = 127°, m∠SOT = 71°, and m∠ROQ = m∠QOS = m∠POT .
Make a sketch and find all missing angle measurements.
m∠QOP = __________
m∠QOT = __________
m∠ROQ = __________
m∠SOP = __________

Using a protractor, accurately plot five points, A, B, C, D, and E, so that all three
statements are true.
(7)
∠DBE is a straight angle.
∠DBA is a right angle.
∠ABC is a straight angle.
(8)
C is in the interior of ∠ADE.
m∠ADC + m∠CDE = 120°.
∠CDB is a straight angle.

Use a compass and straightedge to find the angle bisector.

Use a compass and straightedge to find the angle bisector.

(1)
(2)
(3)
In the diagram, BT is the angle bisector of ∠ABC. Find the value of x. Then find
the measurements of all three angles.