NameDate
Find the missing side
The triangles are similar. Find the scale factor, then the missing side x.
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Similar triangles worksheets
Use the scale factor between similar triangles to find a missing side. There are 2 sheets here: find the missing side and more practice. 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 similar triangles worksheets for?
They suit grades 7 to 8. Each sheet in the tray practices it a different way, so you can pick the one that fits.
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.