Basic geometry

 Basic geometry: This lesson is  prepared by Noor E Alam Sir

Rectangle: A rectangle is a quadrilateral with four right angles. Thus, all the angles in a rectangle are equal (360°/4 = 90°). Moreover, the opposite sides of a rectangle are parallel and equal, and diagonals bisect each other.

Square:A quadrilateral that has all sides equal and opposite sides parallel and all interior angles equal to 90° is called Square. Diagonals of square bisect each other perpendicularly. Note that all squares are rhombus but not vise-versa.

Parallelogram: A parallelogram is a quadrilateral that has its opposite sides parallel and equal to each other. It has its interior opposite angles equal. Also, the angles on the same side of transversal sum up to 180 degrees or supplementary to each other.

Quadrilateral: 'Quadrilateral' is derived from a Latin word, in which, 'Quadra' means four and 'Latus' means sides. a quadrilateral is a closed shape which  has 4 sides, 4 angles, and 4 vertices. 'Quadrilateral' is derived from a Latin word, in which, 'Quadra' means four and 'Latus' means sides.

Rhombus: A rhombus is a quadrilateral (plane figure, closed shape, four sides) with four equal-length sides and opposite sides parallel to each other.

Trapezium: A four-sided closed figure in which one pair of parallel sides opposite to each other and another non-pair of non-parallel sides is called a trapezium.

Kite: A kite is a quadrilateral whose four sides can be grouped into two pairs of equal-length sides that are adjacent to each other. The important properties of the kite are as follows. Two pairs of adjacent sides are equal. One pair of opposite angles are equal. The diagonals of a kite are perpendicular to each other.