Question

If the perimeter of an equilateral triangle is 30 cm ,then the area is​

Answer 1

Step-by-step explanation:

• PERIMETER OF EQUILATERAL TRIANGLE=30CM

• SIDE OF TRIANGLE

30

= ------ CM

3

=10CM

• AREA OF TRIANGLE=√3/4a²

=√3/4*10*10

=25√3cm²

mark it please✌✌✌☺☺

Answer 2

Step-by-step explanation:

✷ Perimeter of a equilateral triangle is 3a where a is the side of the triangle

Given,

⇒3a=30

⇒a=10

we know that area of an equilateral triangle

=√3/4a² units

=√3/4×10² cm²

=√3/4×100 cm²

=√3×25 cm²

=25√3 cm²

therefore the area of an equilateral triangle = 25√3 cm²