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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 4 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 164°. The other is ___
2.Two angles make a straight line. One is 38°. The other is ___
3.Two angles make a straight line. One is 95°. The other is ___
4.Two angles make a straight line. One is 51°. The other is ___
5.Two angles make a straight line. One is 93°. The other is ___
6.Two angles make a straight line. One is 29°. The other is ___
7.Two angles make a straight line. One is 37°. The other is ___
8.Two angles make a straight line. One is 100°. The other is ___
9.Two angles make a straight line. One is 163°. 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 70°. The other is ___
12.Two angles make a straight line. One is 109°. The other is ___

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

Answer key — Angles on a Straight Line

Set 4. Prints on its own sheet.

  1. 1.16°
  2. 2.142°
  3. 3.85°
  4. 4.129°
  5. 5.87°
  6. 6.151°
  7. 7.143°
  8. 8.80°
  9. 9.17°
  10. 10.111°
  11. 11.110°
  12. 12.71°

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