Draw a line segment of length $10 \mathrm{cm}$ and bisect it. Further bisect one of the equal parts and measure its length.

Construct the following angles with the help of a protractor:

$45°, 67°, 38°, 110°, 179°, 98°, 84°$

Draw two rays $PQ$ and $RS$ as shown in the figure below. Using protractor, construct angles of $15°$ and $138°$ with one arm $PQ$and $RS$ respectively.

Using protractor draw a right angle and bisect it to get an angle of measure $45°$.