Worksheets for classifying triangles by sides, angles, or both
Find here an unlimited supply worksheets for classifying triangles by their sides, angles, or both — one of the focus areas of 5th grade geometry. The worksheet are available in both PDF and html formats.
You can control the number of problems, workspace, border around the problems, image size, and additional instructions. Otherwise, it is pretty simple.
Basic instructions for the worksheets
Each worksheet is randomly generated and thus unique. The answer key is automatically generated and is placed on the second page of the file.
You can generate the worksheets either in html or PDF format — both are easy to print. To get the PDF worksheet, simply push the button titled "Create PDF" or "Make PDF worksheet". To get the worksheet in html format, push the button "View in browser" or "Make html worksheet". This has the advantage that you can save the worksheet directly from your browser (choose File → Save) and then edit it in Word or other word processing program.
Sometimes the generated worksheet is not exactly what you want. Just try again! To get a different worksheet using the same options:
 PDF format: come back to this page and push the button again.
 Html format: simply refresh the worksheet page in your browser window.
Below you'll find some readymade worksheets (typically for grade 5 math).
Classify triangles by their sides View in browser Create PDF 
Classify triangles by their angles View in browser Create PDF 
Classify triangles by sides and angles View in browser Create PDF 
Classify triangles by sides and angles (to print in landscape) View in browser Create PDF 
Classify Triangles Worksheet Generator 
Columns:
Rows:
(These determine the number of problems) Number of empty lines below the problem (workspace) 
Page orientation: Portrait Landscape (PDF worksheet only; the orientation of an html worksheet can be set in the print preview of the browser) Font: Font Size:

Additional title & instructions (HTML allowed) 
Key to Geometry Workbooks
Here is a nonintimidating way to prepare students for formal geometry. Key to Geometry workbooks introduce students to a wide range of geometric discoveries as they do stepbystep constructions. Using only a pencil, compass, and straightedge, students begin by drawing lines, bisecting angles, and reproducing segments. Later they do sophisticated constructions involving over a dozen stepsand are prompted to form their own generalizations. When they finish, students will have been introduced to 134 geometric terms and will be ready to tackle formal proofs.