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Angles on a Straight Line is a free printable Grade 4 maths worksheet on angles summing to one hundred and eighty, aligned to Common Core standard 4.MD.C.5. It prints 12 questions with an answer key on its own sheet of paper, in 25 versions that each ask different questions, so no two pupils in the class work from the same page. Print it from the browser or download it as a PDF — no account, no email.

Set 17 of 25 · the same problems every time you open this link.

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Set 1 has all 25 in a single PDF. All 25 sets ask different questions.

Angles on a Straight Line

4.MD.C.5

NameDate

Work out each answer.

1.Two angles make a straight line. One is 139°. The other is ___
2.Two angles make a straight line. One is 43°. The other is ___
3.Two angles make a straight line. One is 160°. The other is ___
4.Two angles make a straight line. One is 112°. The other is ___
5.Two angles make a straight line. One is 109°. The other is ___
6.Two angles make a straight line. One is 100°. The other is ___
7.Two angles make a straight line. One is 113°. The other is ___
8.Two angles make a straight line. One is 33°. The other is ___
9.Two angles make a straight line. One is 141°. The other is ___
10.Two angles make a straight line. One is 106°. The other is ___
11.Two angles make a straight line. One is 136°. The other is ___
12.Two angles make a straight line. One is 37°. The other is ___

LessonPrint · 4.MD.C.5 · Set 17 · free to copy for classroom use

Answer key — Angles on a Straight Line

Set 17. Prints on its own sheet.

  1. 1.41°
  2. 2.137°
  3. 3.20°
  4. 4.68°
  5. 5.71°
  6. 6.80°
  7. 7.67°
  8. 8.147°
  9. 9.39°
  10. 10.74°
  11. 11.44°
  12. 12.143°

Last reviewed 2026-09-05. Aligned to 4.MD.C.5 of the Common Core State Standards for mathematics.