RBSE Solutions for Class 9 Maths Chapter 11 Area of Plane Figures Ex 11.1 is part of RBSE Solutions for Class 9 Maths. Here we have given Rajasthan Board RBSE Class 9 Maths Solutions Chapter 11 Area of Plane Figures Exercise 11.1.
|Chapter Name||Area of Plane Figures|
|Number of Questions Solved||7|
Rajasthan Board RBSE Class 9 Maths Solutions Chapter 11 Area of Plane Figures Ex 11.1
The base and height of a triangle are 20 cm and 6 cm. Find the (RBSESolutions.com) area of the triangle.
Area of triangle = × base × altitude
= × 20 × 6 = 60 cm²
Find the area of the triangle whose sides are 15 cm, 25 cm and 30 cm respectively.
Let a = 15 cm, b = 25 cm and c = 30 cm
Find the area of an isosceles triangle, the measure (RBSESolutions.com) of one of its equal sides being 8 cm and the third side is 4 cm.
Area of an isosceles triangle
Find the area of an equilateral (RBSESolutions.com) triangle whose side is 20 cm.
Area of an equilateral triangle
= 100√3 sq. cm.
A triangular plot whose two sides are 8 cm and 15 cm and its perimeter is 40 cm, then find the area of the triangular plot.
Perimeter of triangular plot = sum of all the three sides
40 = 8 + 15 + third side
=> Third side = 40 – 23 = 17 cm
Area of triangular plot
A triangular table whose sides are in the ratio 3:4:5 and (RBSESolutions.com) its perimeter is 36 m, then find the area of triangular table.
Sides of table are given as 3 : 4 : 5
i.e. sides are 3x, 4x and 5x
∴Perimeter = 36 m
i.e. 3x + 4x + 5x = 36
⇒ 12x = 36
⇒ x = 3
∴Sides are 3x = 3 x 3 = 9 m
4x = 4 x 3 = 12 m
5x = 5 x 3 = 15 m
Area of triangular table
The sides of a triangular field are 20 m, 51 m and 37 m. Find the (RBSESolutions.com) number of flowerbeds that can be prepared if each bed is to contain 2 x 3 sq. metre space.
Let sides of a triangular field be
a = 20 m, 6 = 51 m and c = 37 m
We hope the given RBSE Solutions for Class 9 Maths Chapter 11 Area of Plane Figures Ex 11.1 will help you. If you have any query regarding Rajasthan Board RBSE Class 9 Maths Solutions Chapter 11 Area of Plane Figures Exercise 11.1, drop a comment below and we will get back to you at the earliest.