NameDate
By sides
Tick marks show equal sides. Write equilateral, isosceles or scalene.
equilateralisoscelesscalene
Triangles worksheets
Classify triangles by their sides and by their angles, and find the missing angle in a triangle. There are 3 sheets here: by sides, by angles and missing angles. Pick one from the tray, print it, and add its answer key as a second page if you want one.
Worksheets
Using these sheets
- New problems gives the same kind of sheet with different numbers, so you can print one for class and another for homework.
- The answer key matches the sheet on screen, including after you make new problems.
- Sheets print on US Letter paper. On A4, choose “Fit to printable area” in the print dialog.
Questions
What grade are these triangles worksheets for?
They suit grades 4 to 6. The sheets in the tray go from easier to harder, ending with missing angles.
Is there an answer key?
Yes. Tick “add the answer key as page 2” before printing, or turn on Answer key to check work on screen.
Can I print more than one version?
Yes. Press New problems for a fresh set of the same kind, then print again. The answer key changes with it.
Do I need an account to print?
No. The sheets print straight from this page, free, with no sign-up.