Question

Find the perimeter of an equilateral triangle with side 5 cm.

Answer 1

Answer:

Given:-

The side of an equilaterial triangle is 5cm .

To Find :-

The perimeter of the equilaterial Triangle.

Solution:-

We know,

Perimeter of equilaterial triangle is = 3× side units.

so,

The side of the Triangle = 5cm

As , it is equilaterial that means all sides of it is equal .

Now ,

perimeter of the triangle = 3a units

= 3 × 5 cm

= 15 cm

$\therefore$ The perimeter of the equilaterial triangle is 15CM .

Know More :-

Formullas of equilaterial triangles :

In an equilaterial triangle of side a , we have

• Area = $\dfrac{√3 }{4}$ a² square units.

• Height = $\dfrac{√3 }{2}$ a units .

• Perimeter = 3a units .

Answer 2

Given: The length of the side of an equilateral triangle is $5cm$

To find: The perimeter of the equilateral triangle.

Solution:

An equilateral triangle is a triangle where every side of the triangle is equal and every angle of the triangle is $60^o$

The formula for the perimeter of the triangle is stated as follows:

$3a$, where '$a$' represents the side of the triangle

On calculating the perimeter of the triangle with the given sides,

Perimeter $=3a$

$= 3$ × $5$

$= 15cm$

Final answer:

Hence, the perimeter of an equilateral triangle with side $5cm$ is $15cm$