MathFig

Triangle diagrams for teachers

Worksheet-ready geometry diagrams in seconds

Pick a triangle, type any labels your lesson needs, and download a classroom-ready PNG. MathFig handles the label placement so you can get back to teaching.

Start drawing See examples
  • No install
  • No account needed
  • Eight triangle templates
Illustrated 30-60-90 triangle with algebraic labels A right triangle labeled 2x minus 3, square root of x plus 1 over 5, c, 30 degrees, and 60 degrees. 2x − 3 √(x+1)/5 c 30° 60°
Template illustration · 30-60-90 right triangle

Type the labels. MathFig places them.

Spend your time on the lesson, not nudging text boxes

Start from a familiar triangle, enter exact, approximate, algebraic, or schematic labels, then rotate or mirror the figure. MathFig searches for readable label positions and exports a tightly cropped PNG.

Built for the figure you need now

Fast starts, flexible labels, straightforward exports

Start with a classroom template

Choose among right, equilateral, scalene, isosceles, and composite triangle templates.

Use the labels your lesson needs

Enter ordinary text, fractions, radicals, exponents, and theta-style labels without rebuilding the figure.

Download a PNG

Review the result, then download a tightly cropped image for a worksheet, slide, quiz, or answer key.

All current starting points

Eight triangle templates, ready for your labels

These simplified template illustrations show the current starting shapes. The editor renders your chosen labels and final diagram.

  1. 30-60-90Right triangleTemplate illustration
  2. 45-45-90Right triangleTemplate illustration
  3. 60-60-60EquilateralTemplate illustration
  4. 20-130-30ScaleneTemplate illustration
  5. 36.9-36.9-106.2Wide isoscelesTemplate illustration
  6. 72-72-36Tall isoscelesTemplate illustration
  7. 30-60-90 + 45-45-90Left compositeTemplate illustration
  8. 30-60-90 + 45-45-90Right compositeTemplate illustration

You choose the math

MathFig places your labels; it does not verify mathematical accuracy

Use exact, approximate, algebraic, schematic, or close-enough classroom labels. Review every diagram before classroom use.

Ready when the worksheet is not

Make the triangle. Add the labels. Download the PNG.

Open the triangle editor