Quadrilateral 1. Ex8.1. Q1,2
Автор: Convex tutorials
Загружено: 2025-12-12
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Quadrilateral – Description (Class 9 CBSE)
A quadrilateral is a closed figure formed by four line segments called sides. It has four vertices, four angles, and two diagonals. The sum of all interior angles of any quadrilateral is always 360°.
Quadrilaterals come in different types based on side lengths, angles, and parallelism:
Parallelogram: Opposite sides are parallel and equal.
Rectangle: All angles are right angles and opposite sides are equal.
Square: All sides are equal and all angles are right angles.
Rhombus: All sides equal, but angles are not necessarily 90°.
Trapezium: One pair of opposite sides is parallel.
Kite: Two pairs of adjacent sides are equal.
Quadrilaterals are widely used in construction, design, land measurement, and geometry because of their structural stability and symmetry.
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