Theory - To explore Similarities & Differences in properties of the Quadrilaterals, Class 9 Math Class 9 Notes | EduRev

Mathematics (Maths) Class 9

Created by: Indu Gupta

Class 9 : Theory - To explore Similarities & Differences in properties of the Quadrilaterals, Class 9 Math Class 9 Notes | EduRev

The document Theory - To explore Similarities & Differences in properties of the Quadrilaterals, Class 9 Math Class 9 Notes | EduRev is a part of the Class 9 Course Mathematics (Maths) Class 9.
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Objective : 

To explore similarities and differences in the properties with respect to diagonals of the following quadrilaterals- a parallelogram, a square, a rectangle and a rhombus.

Definition:

It is a quadrilateral where both pairs of opposite sides are parallel. Quadrilateral ABCD is a parallelogram.

Theory - To explore Similarities & Differences in properties of the Quadrilaterals, Class 9 Math Class 9 Notes | EduRev

Properties :

  • A diagonal of a parallelogram divides it into two congruent triangles (▲ ADB is congruent to ▲ ABC).

  • Diagonals of a parallelogram bisect each other.

  • Opposite sides are congruent (AB = DC).

  • Opposite angles are congruent (∠ADC= ∠ABC).

  • Consecutive angles are supplementary (∠DAB + ∠ADC = 180°).

  • If one angle is right angle, then all angles are right.

Theory - To explore Similarities & Differences in properties of the Quadrilaterals, Class 9 Math Class 9 Notes | EduRev

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