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Chapter 3: Q8. (page 161)

Find the value of x such that the perimeter of the triangle is 15units.

Short Answer

Expert verified

The value of x is x=3.

Step by step solution

01

Step 1.Apply the concept of perimeter of triangle

In this, use the concept of perimeter of triangle such that the sum of three sides of the triangle shows the perimeter.

02

Step 2.Finding the equation to solve x

Since,

The three sides of the triangles arex+2,5&3x-4.

Now, the perimeter of the triangle is, Perimeter=sum鈥�of鈥�all鈥�sides.

Perimeter=sum鈥�of鈥�all鈥�sidesPerimeter=x+2+5+3x鈭�415=4x+3
03

Step 3.solving for x.

Since, the expression is 15=4x+3.

15=4x+315鈭�3=4x+3鈭�312=4x4x=12x=124x=3

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