← All lesson plans
Free Geometry and mathsArt and pattern

Seven-Piece Tangram

Make seven fully filled PLA pieces at one scale. Arrange a square on the 90 × 90 mm pattern, a cat and a sailboat, then create your own pictures.

Age
10+ years
Length
approx. 1.5 h
Level
Easy
Where you teach
Home
Purpose
Creative
Worksheet Guide (colour) Guide (ink-saving)

Slides for the session

Open in a new window

Show them on a projector or board. Arrow keys move between slides.

Go to the files ↓

How to run this session

Stages and timing
  1. Build a fully filled piece
  2. Seven figures
  3. Arrange the square
  4. Cat, sailboat and your own picture

What gets built

Build a puzzle that can form many different pictures.

What it practises
  • Making the outline and full coverage.
  • Moving and rotating the pieces during play.

Success criteria
  • Exactly 7 separate, flat and cool pieces: L1, L2, M1, S1, S2, Q1 and P1.
  • No holes in the fill and no separating strands; an outline alone is not a finished piece.
  • All 7 pieces fit in the 90 × 90 mm square pattern without overlapping or being forced. The working clearance comes from the actual line width.
  • The cat and sailboat each use the same 7 pieces once; they can be taken apart again.

What you need
Filament
PLA
Colours
PLA colour of your choice
Also
3D pen compatible with 1.75 mm PLA., 1.75 mm PLA in colours of your choice: about 6.1 m in total for the outlines and filling of seven pieces, plus extra., Transparent sheet included in the kit, suitable for use with PLA and at least A4 size., Three printed A4 pages, T01–T03, at 100% scale., Ruler for checking 20 mm.

Files

The files for this plan are free once you have an account. Download what you need and come back to them any time.

How did the session go?

Your rating and notes come to us only. We do not publish them; we use them to improve the plans.

Rate it school-style, from 1 to 6.

Version 2026-09-29 Updated 2026-09-29

Write to us