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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 12 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 148°. The other is ___
2.Two angles make a straight line. One is 32°. The other is ___
3.Two angles make a straight line. One is 36°. The other is ___
4.Two angles make a straight line. One is 89°. The other is ___
5.Two angles make a straight line. One is 57°. The other is ___
6.Two angles make a straight line. One is 96°. The other is ___
7.Two angles make a straight line. One is 91°. The other is ___
8.Two angles make a straight line. One is 22°. The other is ___
9.Two angles make a straight line. One is 18°. The other is ___
10.Two angles make a straight line. One is 69°. The other is ___
11.Two angles make a straight line. One is 86°. The other is ___
12.Two angles make a straight line. One is 143°. The other is ___

LessonPrint · 4.MD.C.5 · Set 12 · free to copy for classroom use

Answer key — Angles on a Straight Line

Set 12. Prints on its own sheet.

  1. 1.32°
  2. 2.148°
  3. 3.144°
  4. 4.91°
  5. 5.123°
  6. 6.84°
  7. 7.89°
  8. 8.158°
  9. 9.162°
  10. 10.111°
  11. 11.94°
  12. 12.37°

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