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Theorem 8.2 - Chapter 8 Class 9 Quadrilaterals

Last updated at May 29, 2023 by

Theorem 8.2 - Class 9 - In parallelogram, opposite sides are equal.jpg

Theorem 8.2 - Chapter 8 Class 9 Quadrilaterals - Part 2

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Theorem 8.2: In a parallelogram, opposite sides are equal. Given: A parallelogram ABCD with AC as its diagonal To prove: ΔABC ≅ ΔADC Proof: Opposite sides of parallelogram is parallel So, AB ∥ DC and AD‖∥ BC In Δ ABC & Δ ADC ∠ BAC = ∠ DCA AC = AC ∠ DAC = ∠ BCA ∴ ΔABC ≅ ΔADC Hence, AB = CD & AD = BC Hence proved

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Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.