Question

Q15 The sides of a triangle are 3x+1, 4x+2 and 5x. Find the perimeter of
the triangle​

Answer 1

Answer :

• Perimeter of triangle is 12x + 3

Given :

• The sides of a triangle are 3x + 1 , 4x + 2 and 5x

To find :

• Perimeter of triangle

Solution :

• First side = 3x + 1
• Second side = 4x + 2
• Third side = 5x

As we know that,

• Perimeter of triangle = Sum of all sides

➼ Perimeter of side = 3x + 1 + 4x + 2 + 5x

➼ 3x + 1 + 4x + 2 + 5x

➼ 12x + 3

Hence , Perimeter of triangle is 12x + 3

More Explanation :

• Area of triangle = ½ × base × height
• Perimeter of triangle = Sum of all sides

Answer 2

Given :

• The sides of a triangle are 3x+1 , 4x+2 and 5x

To find :

• The perimeter of the triangle

Solution :

Perimeter of a triangle = side + side + side

➠ (3x + 1) + (4x + 2) + 5x

➠ (3x + 4x + 5x) + (1 + 2)

➠ (12x) + (3)

➠ 12x + 3

∴ Required answer :

Perimeter of the triangle = 12x + 3