Geometry
Angle pairs
Name: Date:
Find the angle marked x. Give each answer in degrees.
1 degrees
2 degrees
3 degrees
4 degrees
5 degrees
6 degrees
7 degrees
8 degrees
Free · Grade 7 · Angle facts to 180 degrees
Complementary and supplementary angles worksheets
Working on complementary and supplementary angles? Print this sheet as it is, or change the level and questions first.
- Answer key included
- Reopen this exact sheet
- Letter & A4 ready
Ready to printComplementary and supplementary angles
The answer key prints on a separate page.
What's on this sheet
The arithmetic is deliberately trivial: one subtraction from 90 or from 180. The whole difficulty is knowing which fact applies to the picture in front of you, so the three relationships are drawn so they cannot be confused — a square corner mark for complementary, a ruled straight line for supplementary, and two full lines crossing for vertical.
Why this sheet works
Vertical angles are the ones that catch children out, because the answer is the number they were given rather than something taken away from it. They stay in the mix for exactly that reason: a page where every answer needs a subtraction teaches subtraction, not angle facts.