# Draw an angle of $80^{\circ}$ with the help of a protractor. Then construct angles of (i) $40^{\circ}$ (ii)$160^{\circ}$ and (iii) $120^{\circ}$.

Steps of Construction :

1.         Draw an angle $\angle BAC=80^{\circ}$ with protractor

2.         Taking A as the centre, draw a semi-circle with any radius which cuts AB at point G

And cuts AC at point F.

3.         Taking F and G as centres, draw arcs which intersect each other at D.

4.         Draw AE passing through D.

$\angle EAB=40^{\circ}$

5.         Draw an arc from F with a radius equal to LF which cuts the previous arc at point H.

Then taking H as the centre with the same radius, cut an arc at I.

6.         Draw lines AK and AJ passing through I and H respectively.

$\angle KAB=160^{\circ}$

$\angle JAB=120^{\circ}$

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