Introduction to Geometry

From a single point to 3D solids and beyond.

A complete journey through geometry. We start with the humble point and build up - lines, rays, and segments; then 2D shapes and their properties; then 3D solids; and finally area, perimeter, surface area, and volume - with interactive diagrams at every step.

What's inside (13 lessons)

1. The Point: Where It All Begins
2. Lines, Rays & Segments
3. Angles & How We Measure Them
4. Parallel, Perpendicular & Intersecting Lines
5. Triangles: The Strongest Shape
6. Quadrilaterals & Polygons
7. The Circle
8. Perimeter: Distance Around
9. Area: Space Inside
10. Into the 3rd Dimension: Solids
11. Surface Area
12. Volume: Space a Solid Holds
13. Geometry Problem-Solving Workshop