Construction of Angles using Protractor

Let us constrct ∠PQR = 40°

Steps of Construction:

1. Draw a Base Ray (QR):

• Using a ruler, draw a straight ray QR of any length.

• Label Q as the starting point and R as any point on the ray.

2. Position the Protractor:

• Place the center of the protractor exactly at Q.
• Ensure the baseline of the protractor aligns perfectly with QR.

3. Mark 40° on the Protractor:

• Look at the inner scale of the protractor (since QR is to the right).
• Find 40° and place a small dot at this point. Label it as P.

4. Draw the Second Ray (QP):

• Use a ruler to connect Q to P with a straight line.
• This forms ∠PQR = 40°.