Review the following concept if necessary: Types of Angles Study Guide.

**Types of Angles Practice Questions**

**Problems**

- Name the vertex and sides of the angle.
- Name the vertex and sides of the angle.
- Name the angle in four different ways.
- All angles are made up of what components?

**Use the following figure to answer practice problems 5–8.**

- Name two right angles.
- Name a straight angle.
- Name a pair of opposite rays.
- Why is
*O*an incorrect name for any of the angles shown? - Are and opposite rays? Why or why not?
- If two rays share the same endpoint, do they have to be opposite rays? Why or why not?

**Use the following figure to answer practice problems 9 and 10.**

**Use the following figure to answer practice problems 11–15.**

- Name three acute angles.
- Name three obtuse angles.
- Name two straight angles.
- Determine the largest angle shown, and write it two ways.
- If
*MON*measures 27°, then*JOK*measures ___ degrees. - An angle with measure 90° is called a(n) _____ angle.
- An angle with measure 180° is called a(n) _____ angle.
- An angle with a measure between 0° and 90° is called a(n) _____ angle.
- An angle with a measure between 90° and 180° is called a(n) _____ angle.
- Two adjacent right angles combine to a(n) _____ angle.
- A straight angle minus an acute angle would result in a(n) _____ angle.
- 10°
- 180°
- 98°
- 90°
- Take angles
*A, B, C*, and*D*, from questions 26–29 and list them in order from smallest to largest.

**Complete each statement.**

**Questions 22–25 list the measurement of an angle. Classify each angle as acute, right, obtuse, or straight.**

**You may want to use a corner of a piece of scratch paper for questions 26–29. Classify each angle as acute, right, obtuse, or straight.**

**Answers**

- Vertex:
*Y*; sides: - Vertex:
*J*; sides: *KBT*,*TBK*,*B*,*1*- two rays with a common endpoint
*PON*; (*NOP*) and*POM*(*MOP*)*MON*(*NOM*)- and
- More than one angle uses the letter
*O*as a vertex; therefore, no one would know which*O*you meant. - No; they don't share the same endpoint.
- No; they may not form a line.
*KOL*;*JOK*;*NOM**NOK*;*MOJ*;*MOL**NOL*;*MOK**MOK*;*KOM*- 63° (180° –27° –90°)
- right
- straight
- acute
- obtuse
- straight angle
- obtuse angle
- acute
- straight
- obtuse
- right
- acute
- obtuse
- right
- straight
- The angle measures, from smallest to largest, are
*A*,*C*,*B*, and*D*.

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