Classify triangles as equilateral, isosceles or scalene worksheets

Triangles are drawn with their side lengths labeled, and students circle equilateral, isosceles or scalene.

What is on this worksheet

Triangles are drawn with their side lengths labeled, and students circle equilateral, isosceles or scalene.

  • Shapes: Triangles by their sides

You can change any of these settings above. Press "New problems" for a fresh set with the same settings, or pick Version A to Z to print different sheets for neighboring desks. The answer key always matches.

About classify triangles and quadrilaterals

Triangles are drawn to scale from the side lengths or angles written beside them, so students compare numbers and sort them: equilateral, isosceles or scalene by sides; acute, right or obtuse by angles. Quadrilaterals carry tick marks for equal sides, arrows for parallel sides and small squares for right angles, and students circle the most exact name.

A trapezoid is taken to have exactly one pair of parallel sides, and the page says so. Every name is worked out from the shape itself, and the answer key circles it.

Printing

US Letter or A4, portrait: choose your paper size above. Print at 100 percent (actual size). Use "Black and white" for the copier, or "Color" for display pages and mini books.

More like this

DrillPre-K to K

Position words worksheets

Above, below, next to, left of and right of: read a picture and circle the word that fits.

DrillPre-K to K

Compare size worksheets

Longer, shorter, taller, bigger: circle the pencil, tree or circle that fits the word.