1. Introduction to Geometry - Theorem 1

Introduces plane, or two-dimensional, Geometry; Pi, lines, line-segments, angles, parallelograms, and proofs; also Theorem 1 looks at vertically opposite angles. 08DR JSCA 15 min.

2. Theorems 2 - 9/Constructions 1 and 2

Theorems 2 - 9 cover triangles, exterior angles, isosceles triangles, opposite angles, diagonals and parallelograms; also Constructions 1 and 2 show how to bisect an angle & trisect a line segment. 08DR JSCA 15 min.

3. Theorems 10 - 12/Construction 3

Introduces curves, an ellipse, the circle and its parts; also Theorems 10 - 12 cover circles, line segments, and angles; plus Construction 3 proves the circumcenter of a given triangle. 08DR JSCA 15 min.

4. Theorems 13 - 15/ Constructions 4 and 5

Theorems 13 - 15 cover angles and circles, lines and tangents, and lines and triangles; also Constructions 4 and 5 prove the incenter of a triangle and divide a line segment into equal lengths. 08DR JSCA 15 min.

5. Theorems 16 - 19

Theorems 16 - 19 cover angles of triangles, chords of a circle, tangents and circles, and right-angled triangles. 08DR JSCA 15 min.

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