Question

The perimeter of an equilateral triangle is 3.x2 + xy +9y2 and its altitude is 2x + 4. Find its area.​

Answer 1

Answer:

Let the side of the equilateral triangle be a cm

area of the triangle  

4

3

​  

 

​  

a  

2

=64  

3

​  

 

⇒a  

2

=  

3

​  

 

4×64×  

3

​  

 

​  

 

⇒a  

2

=256

⇒a=16

perimeter of the triangle=3a=3×16=48 cm