Question

A side of an equilateral triangle us 18cm than height​

Answer 1

Answer:

The answer is 15.59 cm

Step-by-step explanation:

Side of triangle = 18cm

height of euilateral triangle = √3/2a

                                              =√3/2*18

                                               = 9√3

                                                = 9*1.732

                                                =15.59cm

Answer 2

$Given \: is \:Equilateral \: triangle \\ \: ∴ \: All \: angles \: are \: equal \: to \: 60° \\ \: </p><p></p><p>Side \: oposite \: to \: 60° \: is \: \frac{ \sqrt{3} }{2} \times hypotenuse$

$\frac{ \sqrt{3} }{2} \times 18 \\ 9 \sqrt{3}\\</p><p>9\times 1.73\\15.57cm</p><p></p><p>$