Question

11.
A side of an equilateral triangle is 18 cm. Then the
height is
(A) 9 V3 cm
(B) 9 cm
36
(C) V3 cm
(D) none of these

​

Answer 1

Formula = √3/2 × a

$\frac{ \sqrt{3} }{2} \times 18$

$\sqrt{3} \times 9 = 9 \sqrt{3}$

So height is 9√3

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