RD Sharma - Mathematics

Book: RD Sharma - Mathematics

Chapter: 20. Mensuration-I (Area of a Trapezium and a Polygon)

Subject: Maths - Class 8th

Q. No. 19 of Exercise 20.1

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The area of a rhombus is 84 m2. If its perimeter is 40 m, then find its altitude.

Perimeter of rhombus = 4 × side

Side of rhombus =

Rhombus is a type of parallelogram, Hence area oa rhombus = area of parallelogram

Therefore area of parallelogram = base× altitude

Base× altitude = area of parallelogram

10 × altitude = 84

Altitude of rhombus = 8.4 m

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