Question

The side of an equilateral triangle is 9cm. Find its altitude.

Answer 1

The height of the equilateral triangle is h=a√3/2

Height=9x√3/2

Height=4.5√3

Answer 2

Answer: 7.70..

Step-by-step explanation: let the

height of altitude be x

Therefore

9sq.=xsq +4.5sq because in equilateral triangle median and altitude are same.

81=20.25+xsq

81-20.25=xsq

60.75=xsq /by long division method x=7.70...