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Angles in a Right Angle is a free printable Grade 4 maths worksheet on angles summing to ninety degrees, 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 13 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 in a Right Angle

4.MD.C.5

NameDate

Work out each answer.

1.Two angles make a right angle. One is 25°. The other is ___
2.Two angles make a right angle. One is 20°. The other is ___
3.Two angles make a right angle. One is 44°. The other is ___
4.Two angles make a right angle. One is 78°. The other is ___
5.Two angles make a right angle. One is 43°. The other is ___
6.Two angles make a right angle. One is 33°. The other is ___
7.Two angles make a right angle. One is 35°. The other is ___
8.Two angles make a right angle. One is 21°. The other is ___
9.Two angles make a right angle. One is 56°. The other is ___
10.Two angles make a right angle. One is 34°. The other is ___
11.Two angles make a right angle. One is 29°. The other is ___
12.Two angles make a right angle. One is 17°. The other is ___

LessonPrint · 4.MD.C.5 · Set 13 · free to copy for classroom use

Answer key — Angles in a Right Angle

Set 13. Prints on its own sheet.

  1. 1.65°
  2. 2.70°
  3. 3.46°
  4. 4.12°
  5. 5.47°
  6. 6.57°
  7. 7.55°
  8. 8.69°
  9. 9.34°
  10. 10.56°
  11. 11.61°
  12. 12.73°

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