Question

Construct an equilateral triangle whose altitude is 7cm.

Answer 1

Altitude of an equilateral triangle =
$\frac{ \sqrt{3} }{2} \times side$
Or you can construct it on paper by
Take a straight line
Draw a 90 degree angle and take a point at 7 cm
Draw 30 degrees angles at both sides
And bisect them to the line taken at first