An equilateral triangle has all three interior angles 60°.
⇒ Draw a straight line, PQ that will be one leg of the angle.
⇒ With a compass on P, Set the width half of PQ
⇒ Draw an arc above P and crossing PQ
⇒ Where the arc crosses PQ, make an arc across the first.
⇒ Draw a straight line toward the x.