Define the following terms :

(i) Line segment

(ii) Collinear points

(ii) Parallel lines

(iv) Intersecting lines

(v) Concurrent lines

(vi) Ray

(vii) Half-line

How many lines can pass through a given point?

In how many points can two distinct lines at the most intersect?

Given two points P and Q, find how many line segments do they determine.

Name the line segments determined by the three collinear points P, Q and R.

Write the truth value (T/F) of each of the following statements:

(i) Two lines intersect in a point.

(ii) Two lines may intersect in two points.

(iii) A segment has no length.

(iv)Two distinct points always determine a line.

(v) Every ray has a finite length.

(vi) A ray has one end point only.

(vii) A segment has one end point only.

(viii) The ray AB is same as ray BA.

(ix) Only a single line may pass through a given point.

(x) Two lines are coincident if they have only one point in common.

In Fig. 7.17, name the following:

(i) Five line segments.

(ii) Five rays.

(iii) Four collinear points.

(iv) Two pairs of non-intersecting line segments.

Fill in the blanks so as to make the following statements true.

(i) Two distinct points in a plane determine a ………..line.

(ii) Two distinct ………….in a plane cannot have more than one point in common .

(iii) Given a line and a point, not on the line, there is one and only……… line which passes through the given point and is ……. To the given line.

(iv) A line separates a plane into …… parts namely the ……. The itself.

How many least number of distinct points determine a unique line?

How many lines can be drawn through both of the given points?

How many lines can be drawn through a given point.

In how many points two distinct lines can intersect?

In how many points a line, not in a plane, can intersect the plane?

In how many points two distinct planes can interesct?

In how many lines two distinct planes can intersect.

How many least number of distinct points determine a unique plane?

Given three distinct points in a plane, how many lines can be drawn by joining them?

How many planes can be made to pass through a line and a point not on the line?

How many planes can be made to pass through two points?

How many planes can be made to pass through three distinct points?