1. An isosceles triangle is constructed as shown in the figure.

Which of the given statements is incorrect?

2. How many perpendicular lines can be drawn to a line from a point not on it?

3. Study the steps of construction given.
Step 1: Draw a ray OA.
Step 2: With O as centre and any convenient radius draw an arc MN to cut OA at M.
Step 3: With M as centre and the same radius draw an arc to cut MN at P.
Step 4: With P as centre and the same radius, draw an arc to cut MN at Q.
Step 5: Draw OQ and produce it to D. An angle AOD is constructed.
What is the measure of ∠AOD?

4. Direction: David folds a sheet of paper. The dotted lines as shown in the figure are the creases formed, which are named as l, m and n.

5. A Choose the correct option in which a triangle CANNOT be constructed with the given lengths of sides.

6. In the given figure, find the measure of ∠ROT, if PQ = QR and ∠QPR = 60°.