MathSprig

Classifying angles

Name acute, right, obtuse, straight and reflex angles.

Practice + answer key · 4 pages

Worksheet settings8 questions · 2 columns · A4
Angle measures

Select whole degrees from 1 to 359; the arc shows the intended angle.

Layout
Text size
Paper size
More options

Save this seed with the settings and generator version to make the same worksheet again. Use a word or code, not a name or other personal information.

Generator
mathsprig-1
Content ID
e5c6611a
Paper size
2 pages
Classifying anglesClassifying angles. Practice. Classify the marked 180° angle. Classify the marked 90° angle. Classify the marked 90° angle. Classify the marked 107° angle.Name __________________________Date _______________Classifying anglesClassify each labeled angle.Worked exampleClassify an angle of 125°. → Obtuse125° is greater than 90° and less than 180°.1.Classify the marked 180° angle.Two rays share a vertex. The marked arc identifies the angle to classify.180°2.Classify the marked 90° angle.Two rays share a vertex. The marked arc identifies the angle to classify.90°3.Classify the marked 90° angle.Two rays share a vertex. The marked arc identifies the angle to classify.90°4.Classify the marked 107° angle.Two rays share a vertex. The marked arc identifies the angle to classify.107°MathSprig · mathsprig.site · support@mathsprig.sitePage 1 of 2mathsprig-1 · mathsprig-v1 · e5c6611a
Classifying anglesClassifying angles. Practice. Classify the marked 288° angle. Classify the marked 180° angle. Classify the marked 305° angle. Classify the marked 175° angle.Name __________________________Date _______________Classifying anglesClassify each labeled angle.5.Classify the marked 288° angle.Two rays share a vertex. The marked arc identifies the angle to classify.288°6.Classify the marked 180° angle.Two rays share a vertex. The marked arc identifies the angle to classify.180°7.Classify the marked 305° angle.Two rays share a vertex. The marked arc identifies the angle to classify.305°8.Classify the marked 175° angle.Two rays share a vertex. The marked arc identifies the angle to classify.175°MathSprig · mathsprig.site · support@mathsprig.sitePage 2 of 2mathsprig-1 · mathsprig-v1 · e5c6611a
2 pages
Prints without menus or ads

Practice + answer key · 4 pages

Geometry

What you’ll practice

Assign an angle type from its degree measure.

Use the given degree measure to name each angle. The marked arc shows the turn you need to classify, which matters when an angle is greater than 180°.

How this skill works

Acute angles are between 0° and 90°; a right angle is 90°. Obtuse angles are between 90° and 180°.

A straight angle is 180°. A reflex angle is greater than 180° and less than 360°.

Worked example

Classify an angle of 125°.
  1. 125° is greater than 90° and less than 180°.
  2. It is an obtuse angle.

Answer: Obtuse

Teaching notes

  • Use the marked arc, not the smaller gap between two rays, for a reflex angle.
Practice questions
  1. Classify the marked 180° angle.

    Two rays share a vertex. The marked arc identifies the angle to classify.

  2. Classify the marked 90° angle.

    Two rays share a vertex. The marked arc identifies the angle to classify.

  3. Classify the marked 90° angle.

    Two rays share a vertex. The marked arc identifies the angle to classify.

  4. Classify the marked 107° angle.

    Two rays share a vertex. The marked arc identifies the angle to classify.

  5. Classify the marked 288° angle.

    Two rays share a vertex. The marked arc identifies the angle to classify.

  6. Classify the marked 180° angle.

    Two rays share a vertex. The marked arc identifies the angle to classify.

  7. Classify the marked 305° angle.

    Two rays share a vertex. The marked arc identifies the angle to classify.

  8. Classify the marked 175° angle.

    Two rays share a vertex. The marked arc identifies the angle to classify.

Answers and steps
  1. Straight
    1. An angle of exactly 180° is a straight angle.
  2. Right
    1. An angle of exactly 90° is a right angle.
  3. Right
    1. An angle of exactly 90° is a right angle.
  4. Obtuse
    1. 107° is greater than 90° and less than 180°.
  5. Reflex
    1. 288° is greater than 180° and less than 360°.
  6. Straight
    1. An angle of exactly 180° is a straight angle.
  7. Reflex
    1. 305° is greater than 180° and less than 360°.
  8. Obtuse
    1. 175° is greater than 90° and less than 180°.