Question

construct an equilateral triangle PQR given one side is 8 cm

Answer 1

First, draw a straight line (>8 greater than 8)name it AB.
then measure 8 cm on the rounder and cut an arc from A over B.
repeat the same process and draw an arc from B over A.
Now join the point of intersection of both arcs (i. e. C)
Hence you got an EQUILATERAL TRIANGLE