Question

find the height of equilateral ∆ with side 3 cm​

Answer 1

Answer:

3+3+3=9 is the correct answer .. of the question

Answer 2

Step-by-step explanation:

we know that equilateral triangle has all sides are equal ,then let us consider a triangle ABC

with all sides 3cm

now we will draw perpendicular line from A and drop it between BC line at 90° at E

we will get two right angled triangle in ∆ABC

and we have in this triangle

Hypotenuse=3

and base EC =3/2

use here famous theorem ,

height=√(3)^2-(3/2)^2

√9-9/4

√27/4

3√3/2