Question

area of equalatral triangle if perimeter is 12cm​

Answer 1

Answer:

8cm

Step-by-step explanation:

a=one of the side of the triangle

Perimeter of a equilateral triangle =3a

12=3a

12/3=a

4=a

Hence the side is of the length 4cm

as all the 3 sides are equal each of them will be of the measure 4

The area of a triangle= 1/2(b×h)

=1/2(4×4)

=1/2(16)

=8 cm

hope it helped

Answer 2

Answer:

$4\sqrt{3} cm^2 = 6.928 cm^2$

Step-by-step explanation:

An equilateral triangle is a triangle in which all three sides have the same length

Perimeter of Equilateral triangle = 3a

where a is the side of triangle

$3a = 12\\a = 4$

Area of Equilateral triangle

$A = \frac{\sqrt{3} a^2}{4}$

$A = \frac{\sqrt{3} 4^2}{4} = 4\sqrt{3} cm^2$