- Teoremas
- Tangents and Radius Theorem
- Angle at the centre Theorem
- Two Tangents Theorem
- Triangle Inequality Theorem
- Teorema de Napoleão
- Triangle Midsegment Theorem
- The Theorem of Pythagoras by shear mapping
- Triangle Exterior Angle Theorem
- Triangle Sum Theorem
- Exterior Angle Theorem
- Theorem 01 - Vertically Opposite Angles
- Theorem 02 - Isosceles Triangle
- Theorem 03 - Alternate Angles and Parallel Lines
- Pick's Formula
- Theorem 11
- Theorem 21
- Theorem 19
- Theorem 16
- Theorem 18
- Theorem 15
- Theorem 14
- Theorem 20
- Theorem 13
- Theorem 12
- Theorem 8
- Theorem 9
- Theorem 10
- Theorem 4
- Theorem 5
- Theorem 6
- Theorem 1
- Theorem 2
- Theorem 3
- Corollary 1 to Theorem 10
- Corollary 2 to Theorem 19
- Corollary 3 to Theorem 19
- Corollary 4 to Theorem 19
- Corollary 5 to Theorem 19
- Corollary 6 to Theorem 20
- Axiom 4 (2)
- Axiom 4 (3)
- Axiom 4 (4)
- Axiom 4 (1)
- Axiom 5
- Axiom 3
- Axiom 2
- Axiom 1
