Class 3 Math: Shapes and Designs Quick Revision Chapter Summary

Need to review the entire chapter before a test? This quick revision guide summarizes all the core concepts, topics, and equations taught in Class 3 Shapes and Designs to help you refresh your memory instantly.

Core Topics At a Glance

### 📌 2D Shapes: edges and corners 2D shapes have edges (straight boundary segments) and corners or vertices (points where two edges meet).

### 📌 Tangrams (5-piece & 7-piece) A tangram is a Chinese geometric puzzle consisting of a square cut into 5 or 7 pieces (tans) that can be arranged to form various shapes.

### 📌 Weaving patterns and tiling Weaving patterns and tiling (tessellations) are repeating arrangements of geometric shapes that cover a floor or grid surface with no gaps.

### 📌 3D shapes basic properties Solid 3D shapes have three dimensions: length, width, and height. They are made up of faces (flat surfaces), edges (where two faces meet), and vertices (corners). Examples include cubes, cylinders, cones, and spheres.

Key Formulas Mind Map

• Euler Flat Edge count: `C = E` - In simple 2D polygons, the count of corners (vertices) matches the edges....

Revision Checklist

1. Review the subtopic guides and outline notes.
2. Practice writing the key formulas from memory.
3. Solve at least 3 worked examples and check your steps.
4. Take a timed practice quiz to verify your speed.