Question

e) Find the perimeter of an equilateral triangle with sides of 15 cm length.​

Answer 1

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Perimeter of the Equilateral Triangle with side is 15cm =45cm

Step-by-step explanation:

Given

• 》Side of the Equilateral Triangle = 15cm

We know that To find the perimeter of a triangle =

• 》 Side + Side + Side

Since the Triangle is an Equilateral Triangle, so it's all sides are equal. So, we know that 1 side is 15cm So, the other sides measures are 15cm,15cm,15cm.

So, perimeter of The equilateral Triangle = Side+ Side + Side = 15 + 15 + 15 = 45cm

∴Perimeter of the Equilateral Triangle = 45cm

Add to your Knowledge

What is an Equilateral Triangle?

Ans: A Triangle in which all the sides and all the angles are equal is called an Equilateral Triangle.

Answer 2

✰✰|| Solution :

perimeter of equilateral triangle = side × 3

= 15cm × 3

= 45cm

✪✪|| Other information :

• Area of equilateral triangle = √3s2/4.

• all three sides have the same length

• all three internal angles are also congruent to each other and are each 60°