Question

draw an equilateral triangle whose sides are 4.5cm each

Answer 1

draw the line then on the left side draw the measure the 4.5 CM line and mark an arc and then on the right side major the 4.5 and mark the arc and join the whole triangle it will become the equilateral triangle

Answer 2

perimeter is
$4.5 + 4.5 + 4.5 = 3.5cm$