Question

Hi i will mark as brain list please
Please tell me answer of this question in easy way but Step-by-step explanation

Answer 1

hey!

area of equilateral triangle=√3/4a^2

81√3=√3/4a^2

√3 got cancelled from both sides now

81 = 1/4×a^2

√81×4 = a

√9×9×2×2=a

9×2 = a

18 = a

height formula = √3/2a

= √3/2×18

=√3×9

=9√3

hence height is 9√3 that is option 1 is correct

Answer 2

Please mark as brain list please please