Using your protractor draw an angle of measure $36°.$ With this angle as given, draw another angle of measure $72°.$ Verify by measurement.

Draw two circles of equal radii with centres $\text{A and B}$ such that each of them passes through the centre of the other. Mark the points where they intersect each other as $\text{C and D}$. Examine whether $AB\perp CD$? 

Using protractor draw $\angle BAC$ of measure $50°$. In $AC$, take a point $P$, such that $AP=4.5 \text{cm}$. From $P$, draw a line segment perpendicular to $AB$.

Use a protractor to draw angle of $118°$.Bisect the angle using ruler and compass only.

With compass and a ruler, construct an angle of $30°$.

With compass and a ruler, construct an angle of $45°$.