#### Topics

##### Basic Concepts in Geometry

##### Parallel Line

##### Triangles

- Concept of Triangles - Sides, Angles, Vertices, Interior and Exterior of Triangle
- Theorem of remote interior angles of a triangle
- Congruence of Triangles
- Isoscles Triangle Theorem
- Property of 30-60-90 Triangle Theorem
- Median of a Triangle
- Perpendicular bisector Theorem
- Angle bisector theorem
- Properties of inequalities of sides and angles of a triangle
- Similar Triangles

##### Constructions of Triangles

##### Quadrilaterals

##### Circle

##### Co-ordinate Geometry

##### Trigonometry

##### Surface area and volume

#### description

- If pairs of opposite sides of a quadrilateral are congruent then that quadrilateral is a parallelogram.
- If both the pairs of opposite angles of a quadrilateral are congruent then it is a parallelogram.
- If the diagonals of a quadrilateral bisect each other then it is a parallelogram.
- A quadrilateral is a parallelogram if a pair of its opposite sides is parallel and congruent.

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