In previous chapters, we have learned to find the area and perimeters of various plane figures like triangles, squares, rhombuses etc. Now, in this chapter, we will learn to find the area of the trapezium. We will also practice different problems on finding the areas of polygons by utilizing the formulas of the area of triangle and trapezium.
The areas and perimeters of various plane figures are given below:
Area of Rectangle = length \(\times \)
Perimeter of Rectangle = 2 (Length + Breadth)
Area of Square = Side \(\times \)
Perimeter of Square = 4 \(\times \)
Area of parallelogram = Base \(\times \)
Perimeter of parallelogram Â = 2 \(\times \)
Area of Triangle = \(\frac{1}{2}\)
Area of Circle = \(\pi \; r^{2}\)
RD Sharma Solutions for Class 8th Mensuration will help you to understand the steps and tricks involved in finding the area of a trapezium and a polygon from the basics. Now understand this concept in detail with complete exercise wise RD Sharma Solutions that will make your learning much easier and will prepare you well for solving different complex problems related to Mensuration very quickly.
Chapter 20 Mensuration I (Area of a Trapezium and a Polygon) | |
Mensuration I (Area of a Trapezium and a Polygon) Exercise 20.1 | Mensuration I (Area of a Trapezium and a Polygon) Exercise 20.2 |
Mensuration I (Area of a Trapezium and a Polygon) Exercise 20.3 |