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4th Grade Math (Grade 4) · Chapter 11 · Lesson 11.6 · Printable PDF

Angle Measures Add, and Finding a Missing Angle Worksheet with Answer Key

6 problems on angle measures add: finding the missing part of an angle in degrees, checking if split angles can be right, angles in a figure, writing an equation for a third part, and angles that fill a right angle or full turn. 2 pages, with a worked answer key.

6 problems2 pagesanswer key
Printable Angle measures add, and finding a missing angle worksheet with answer key - 4th Grade Math (Grade 4) (Page 1 PDF preview)
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Try one first: a free Chapter 1 worksheet (PDF, no sign-in).

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What's on the worksheet

  1. Find the number for each box in the angle equations, in degrees:
  2. Decide whether Kevin's split angle numbers can be right, with one sentence of why.
  3. Use the figure with rays OB and OC inside angle AOD to find the unknown angles.
  4. Two parts of a 138 degree angle are 43 and 55: write an equation and find the third part.
  5. Pick three of six angles that fill a right angle, and decide if all six fill a full turn.
  6. Use five rays around point O in the figure to find the missing angles.

Teach it first

The free lesson teaches it with worked examples and practice problems.

Angle measures add, and finding a missing angle: the lesson ›

More Chapter 11 worksheets: Angles and measuring them