Write how many line can be drawn through three non-collinear points?

From the adjoining figure, write: all the lines which intersect EF.

State if the following figure shows two mutually perpendicular lines:

Use a ruler and whether the following points are collinear or not:
D, A and C

Write how many line can be drawn through a given point?

Using the given figure, answer the following:
Name the pairs of mutually perpendicular lines.

Give two examples, from your surrounding, for the following: 
points