Question

find the area of an equilateral triangle of side 60cm​

Answer 1

Answer:

17.32cm

Step-by-step explanation:

Given, perimeter of equilateral triangle is 60cm.

Perimeter of equilateral triangle=60cm

3× side =60

∴ side =  

3

60

​  

=20cm.

Area of equilateral triangle =  

4

3

​  

(side)  

2

 

​  

 

=  

4

3

​  

×20  

2

 

​  

 

=100  

3

​  

cm  

2

=173.2cm  

2

 

Height of equilateral triangle =  

2

3

​  

(side)

​  

 

=  

2

3

​  

×20

​  

 

=10  

3

​  

cm=17.32cm