Mathematics
Easy

Question

# Find the perimeter of the triangle where the lengths are 3x, 4x and 5x.

## 12x    14x    15x    2x Hint:

## The correct answer is: 12x

### The given values for the sides of the triangle are 3x, 4x and 5x.We have to find the perimeter of a triangle. We know that perimeter means the total length of the boundary of the shape. As a triangle has three sides, we will have to add them to get the length of complete boundary, or in other words a perimeter.The formula for the perimeter of a triangle will bePerimeter = sums of all sidesFor this question, the values of sides are 3x, 4x and 5xTherefore, the perimeter will bePerimeter = 3x + 4x +5xAs there are three terms with the same variable, we can add them directly like normal numbers.On adding we getPerimeter = 12x units.Therefore, the perimeter of the triangle will be 12x units.So option (c), which is ‘12x’, is the right option.

The main part of such questions to find the correct relation between the variables. For that, we need to remember the formulas of area and perimeter of shapes.

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