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Learn Key Concepts
Explore the fundamental concepts and skills for this unit through our interactive lessons.
Right angled triangles
Pythagoras's theorem and sohcahtoa.
Non-right-angled triangles
sin and cos rules, general area of a triangle.
Applied triangle geometry
Angles of elevation and depression, true bearings, projections and more.
Circles: Radians, arcs and sectors
Measuring angles in radians, circumference & arc lengths and sector areas
3D solids
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