Congruent triangles Animation Play

Congruent triangles Animation Play

Congruent triangles – solving problems Student activity Play

Constructing a congruent angle Animation Play

Corresponding segments and angles – reflection Animation Play

Corresponding segments and angles – rotation Animation Play

Dividing an equilateral triangle into nine congruent triangles Whiteboard exercise Play

Fingerprints Animation Play

How to check directly whether two triangles are congruent Whiteboard exercise Play

How to check directly whether two triangles are congruent Student activity Play

Parallelograms, rectangles, rhombuses and squares – properties of diagonals Student activity Play

Prisms Student activity Play

Proof and demonstration of the formula for the area of a triangle Student activity Play

Properties of diagonals in a parallelogram Animation Play

Properties of diagonals in a rectangle Animation Play

Properties of reflection Student activity Play

Properties of rotation Student activity Play

Recognition of congruent triangles Animation Play

Ruler-and-compass constructions Class activity Play

Ruler-and-compass constructions Whiteboard presentation Play

Sectors and segments Whiteboard exercise Play

Sectors and segments Student activity Play

The Angle-Side-Angle (ASA) property Whiteboard exercise Play

The Angle–Side–Angle property – observations and generalisation Student activity Play

The area of a triangle Animation Play