Draw lines(s) of symmetry for each of the following letters :

Construct a triangle ABC in which AB = AC = 5 cm and BC =6 cm.

Draw its line(s) of symmetry.

Construct a triangle PQR in which :
PQ = QR = 4.2 cm and ∠PQR = 90°.

Draw all its lines of symmetry.

Mark two points A and B 6.4 cm apart. Construct the line(s) of symmetry so that the points A and B are symmetric with respect to this line.