Quadrilateral:
A two dimensional polygon shape with four sides and four vertices is known as quadrilateral. For example: Square, Rectangle etc.
Parallelogram:
A parallelogram is a specific type of quadrilateral in which opposite sides are both parallel (meaning they will never intersect) and equal in length. Additionally, opposite angles in a parallelogram are also equal in measure.
Point of Trisection:
Point of trisection is the point where three lines intersect each other at the same time.
Point of concurrency:
Point of trisection of medians is the center point where all the three medians of a triangle intersect each other at the same time. In triangle ABC, point G is the point of concurrency of medians AD, BE and CF.
