4 resources.
The Pythagorean theorem explained, with a worked real-world distance example.
Line segment, ray and line: the differences, collinear points and concurrent lines, Euclid's axiom about lines through two points, linear pairs of angles, counting segments, and common mistakes.
Area and perimeter formulas for rectangles, squares, circles, sectors, triangles (including Heron's formula) and regular pentagons, with worked examples and common mistakes.
Surface area and volume formulas for the cuboid, cube, sphere, hemisphere, cylinder, cone and frustum, with worked examples including a combined solid, and common mistakes.