Geometry — Grade 9
Interactive geometry lessons by ironfern.
Chapters
- §2 Solving Triangles — Trigonometric functions, Law of Cosines, Law of Sines, triangle area formulas
- §3 Regular Polygons — Regular polygons, circumference, circle area
- §4 Cartesian Coordinates on a Plane — Distance formula, equations of lines and figures, coordinate method
- §5 Vectors — Vector concept, coordinates, addition, scalar product
- §6 Transformations of Figures — Isometries, translation, symmetry, rotation, homothety
- §7 Introduction to Solid Geometry — Lines and planes in space, prisms, pyramids, cylinders, cones, spheres