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  1. Chapter 11 Class 8 Mensuration
  2. Concept wise

Transcript

Shapes Figure Formula Rectangle Area = l × b Square Area = a2 Triangle Area = 1/2 × Base × height Can also be found by Heron’s formula & Co- ordinate geometry formula Equilateral triangle Area = √3/4 a2 Circle Area = 𝜋r2 Sector Area = 𝜃/360 × 𝜋r2 Where 𝜃 = angle in degree Segment Area of segment = Area of sector − Area of triangle Parallelogram Area = Base × Height Trapezium Area = 1/2 × h × (a + b) Rhombus Area = 1/2 × Diagonal 1 × Diagonal 2

About the Author

Davneet Singh's photo - Teacher, Computer Engineer, Marketer
Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 9 years. He provides courses for Maths and Science at Teachoo.