Bring Learning to Life
11.1 Lines, angles and triangles: Why triangles are important
11.2 Lines, angles and triangles: Types of triangle
11.3 Lines, angles and triangles: Acute-angled, obtuse-angled and right-angled triangles
11.4 Lines, angles and triangles: Basic geometrical terms for triangles
11.5 Lines, angles and triangles: Rules for triangles
11.6 Lines, angles and triangles: Rules for triangles - example
11.7 Lines, angles and triangles: Rules for triangles - equal angles and equal sides
11.8 Lines, angles and triangles: Rules for triangles - congruency
11.9 Lines, angles and triangles: Rules for triangles - corresponding lines and angles
11.10 Lines, angles and triangles: 4 ways to prove congruency
11.11 Lines, angles and triangles: 4 ways to prove congruency (part 2)
11.12 Lines, angles and triangles: Why congruency is important