Question

Side of an equilateral triangle is x if the perimeter is 30 cm find the value of x

Answer 1

10 cm

Explanation:

This one's simple if you think about the words.

What does "equilateral triangle" mean? It means a 3-sided figure (triangle) where the 3 sides are the same length (equilateral).

So if the 3 sides add up to 30 cm (the definition of "perimeter"), can you see right away what the length of one side is? If not, then you get to do some math:

x + x + x = 30cm

3x = 30cm

x = 10 cm