Construction:
(i) Placed the centre of the protractor at the vertex A. Line up the ray \(\overline { AB } \) with the 0° line. Then draw and labelled a point C at the 65° mark on the (a) inner scale (anti clockwise) (b) outer scale (clockwise)
(ii)Removed the protractor and draw \(\overline { AC } \) to complete the angle.
Now

   
1. Draw the base ray PQ
2. Placed the center of the protractor at the vertex P.  lined up the ray \(\overline { PQ } \) with the \({ 0 }^{ 0 }\) line. Then drawn and labeled a pointed.

(i) parallel lines:
\(\overline{CD}\) and \( \overline{EF}\), \(\overline{CD} \) and \(\overline{IJ}\), \(\overline{EF} \ and\ \overline{IJ}\)
(ii) intersecting lines:
\(\overline{AB}\) and \( \overline{CD},\) \(\overline{AB}\) and \( \overline{EF},\) \(\overline{AB}\) and \( \overline{IJ},\) \(\overline{GH}\) and \( \overline{IJ},\) \(\overline{AB}\) and \( \overline{GH}\)
(iii) points of intersection:
P, Q and R

QR = 10 cm

Construction:
Step 1: Drawn a line 'l' and marked the point Q on it
Step 2: Measured 10 cm using compass by placing pointer at 'O' and pencil pointer at 10 cm.
Step 3: Placing pointer at Q drawn the arc on 'l' with pencil pointer and named the point R
Step 4: QR is the required line segments of 10 cm.

AB = 7.5 cm

Construction:
Step 1: Drawn a line I and marked the point A
Step 2: Measured 7.5 cm using compass placing the pointer at 'O' and pencil pointer at 7.5 cm
Step 3: Placing compass pointer at A, drawn an arc on l with the pencil pointer. It cut 'l' at B
Step 4: AB is the required segment of length 7.5 cm