Question

Find the length of one side of an equilateral triangle if the perimeter of the triangle is 12.6m.

Answer 1

Answer:

(i) Length = 24.5 m

Breadth = 18 m

∴ Area of the rectangle = Length × Breadth

= 24.5 m × 18 m

= 441 m2

(ii) Length = 12.5 m

Breadth = 8 dm = (8 × 10) = 80 cm = 0.8 m [since 1 dm = 10 cm and 1 m = 100 cm]

∴ Area of the rectangle = Length × Breadth

= 12.5 m × 0.8 m

= 10 m2

Answer 2

Answer:

Hence, value of length of side of equilateral triangle will be 4.2 m

Step-by-step explanation:

In context to question asked,

We have to determine the length of side of equilateral triangle.

As per question,

We have,

Perimeter of triangle = 12.6 m

As we know that,

• All the sides of equilateral triangle are same.

• The perimeter of equilateral triangle can be determined by adding the length of all the sides.

As we have,

Formula for determining the perimeter of equilateral triangle as,

$Perimeter = side +side +side = 3 \times side$

So, for determining the value of length of equilateral triangle,

We will put the value of perimeter of triangle given in the question in above formula,

Thus we will get,

$Side = \frac{Perimeter}{3}\\=>Side = \frac{12.6}{3} = 4.2\:m$