## As performed in the real lab:

### Materials required:

Coloured papers, pair of scissors, gum, scale, compass, pencil, carbon papers or tracing papers.

### Procedure:

1. Draw a circle of any radius with centre O and cut it.

2. Paste the cutout on a rectangular sheet of paper. [Fig 1(a)].

3. Fold the circle in any way such that a chord is made. Draw the line segment AB.

[Fig 1(b)].

4. Take two points P and Q on the circle in the same segment. [Fig 1(c)].

5. Form a crease joining AP. Draw AP. [Fig 1(d)].

6. Form a crease joining BP. Draw BP. [Fig 1(e)].

7. ∠ APB is formed in the major segment. [Fig 1(f)]

8. Form a crease joining AQ. Draw AQ. [Fig 1(g)]

9. Form a crease joining BQ. Draw BQ. [Fig 1(h)]

10. ∠ APB and ∠ AQB are formed in the major segment. [Fig 1(i)]

11. Make replicas of ∠ APB and ∠ AQB using carbon paper or tracing paper.

[Fig 1(j)]

12. Place the cutout of ∠ APB on the cutout of ∠ AQB.

## As performed in the simulator:

### Procedure:

1) Mark a point on the workbench area such that it forms radius for the circle with point O as the origin.

2) Mark two points A and B on circle to draw chord AB.

3) Mark two points P and Q on the circle in any one of the segment to form ∠APB and ∠AQB.

4) Click on ∠APB to rotate it.

5) Drag ∠APB and place over ∠AQB such that they overlap each other.

## Observations:

1. ∠ APB and ∠ AQB are angles in the same segment.

2. ∠ AQB covers ∠ APB exactly. Therefore ∠ APB = ∠ AQB.