(1) Draw ∠BAC = 72° using a protractor.
Using A as the center and radius less than AB and AC, draw a circular arc, intersecting AB and AC at D and E respectively.
(2) Taking D as the center draw an arc of any radius greater than \(\frac{DE}{2}\) .
Now,
Taking E as the center and the keeping the same radius, draw another arc, intersecting the previous arc at F.
Join AF,
Which intersects the arc DE at point G.
∠BAF = 36°.
(3) Taking G as the center draw an arc of any radius greater than \(\frac{GE}{2}\) .
Now,
Taking E as the center and keeping the same radius, draw another arc, intersecting the previous arc at H.
Join AH.
(4) ∠BAH = 54°.
