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In parallelogram

  • Opposite angles are equal

∠A = ∠C and ∠B = ∠D

 

  • Adjacent angles are supplementary

  ∠A + ∠B = 180°

  ∠A + ∠D = 180° 

  ∠C + ∠D = 180°    

  ∠B + ∠C = 180°

  1. Chapter 3 Class 8 Understanding Quadrilaterals
  2. Concept wise
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Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 8 years. He provides courses for Maths and Science at Teachoo. You can check his NCERT Solutions from Class 6 to 12.