Book: RD Sharma - Mathematics
Chapter: 20. Mensuration-I (Area of a Trapezium and a Polygon)
Subject: Maths - Class 8th
Q. No. 3 of Exercise 20.3
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3
There is a pentagonal shaped park as shown in Fig. 20.50. Jyoti and Kavita divided it in two different ways.
Find the area of this park using both ways. Can you suggest some another way of finding its area?
Area of given figure = Area of trapezium + area of rectangle
Area of Jyoti’s diagram = 
Area of given figure = 
Area of given figure = 337.5 cm2
Therefore area of given figure is 54 cm2
Area of given pentagon = Area of triangle + area of rectangle
Area of given pentagon = 
Area of given pentagon = 
Area of given pentagon = 
Therefore area of given pentagon is 337.5 cm2
