Example: air traffic controller
QUADRILATERALS - NCERT
Sides, Angles and diagonals of a quadrilateral; Different types of quadrilaterals: Trapezium, parallelogram, rectangle, rhombus and square. • Sum of the angles of a quadrilateral is 360º, • A diagonal of a parallelogram divides it into two congruent triangles, • In a parallelogram (i) opposite angles are equal (ii) opposite sides are equal
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