Skip to content
LessonPrint

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

Next set

One paper per pupil

12345678910111213141516171819202122232425

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 155°. The other is ___
2.Two angles make a straight line. One is 136°. The other is ___
3.Two angles make a straight line. One is 115°. The other is ___
4.Two angles make a straight line. One is 21°. The other is ___
5.Two angles make a straight line. One is 80°. The other is ___
6.Two angles make a straight line. One is 15°. The other is ___
7.Two angles make a straight line. One is 95°. The other is ___
8.Two angles make a straight line. One is 108°. The other is ___
9.Two angles make a straight line. One is 162°. The other is ___
10.Two angles make a straight line. One is 165°. The other is ___
11.Two angles make a straight line. One is 56°. The other is ___
12.Two angles make a straight line. One is 68°. The other is ___

LessonPrint · 4.MD.C.5 · Set 6 · free to copy for classroom use

Answer key — Angles on a Straight Line

Set 6. Prints on its own sheet.

  1. 1.25°
  2. 2.44°
  3. 3.65°
  4. 4.159°
  5. 5.100°
  6. 6.165°
  7. 7.85°
  8. 8.72°
  9. 9.18°
  10. 10.15°
  11. 11.124°
  12. 12.112°

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