Question

Mark four points A, B, C and D in your notebook such that no three of them are collinear. Draw all the lines which join them in pairs as shown in Fig. 10.23.


(i) How many such lines can be drawn?
(ii) Write the names of these lines.
(iii) Name the lines which are concurrent at A.

Answer 1

From the given figure, we have:

(i) Six lines can be drawn through these four points as given in the figure.
(ii) These lines are AB, BC, CD, AD, BD and AC.
(iii) Lines which are concurrent at A are AC, AB and AD.