Question

The height of an equilateral triangle measure 9cm.find its area, correct to 2 places of decimal. (take root under 3=1.732​

Answer 1

Answer:

Height =

2

3

(side)=9

⇒ side =

3

18

Now,

Area =

4

3

(side)

2

=

4

3

×

3

×

3

18×18

=3

3

×9

=3×1.732×9

=5.196×9

=46.764cm

2