Basic Geometrical Ideas-Solutions Ex-4.1
CBSE Class –VI Mathematics
NCERT Solutions
Chapter 4 Basic Geometrical Ideas (Ex. 4.1)
NCERT Solutions
Chapter 4 Basic Geometrical Ideas (Ex. 4.1)
Question 1. Use the figure to name:

(a) Five points
(b) A line
(c) Four rays
(d) Five line segments
Answer: (a) Five points are: O, B, C, D, E
(b) A line:
(c) Four rays:
(d) Four line segments: ,
Question 2. Name the line given in all possible (twelve) ways, choosing only two letters at a time from the four given.

Answer:
Question 3. Use the figure to name:

(a) Line containing point E.

(a) Line containing point E.
(b) Line passing through A.
(c) Line on which O lies.
(d) Two pairs of intersecting lines.
Answer: (a) A line containing E = or
(b) A line passing through A = or
(c) A line on which O lies = or
(d) Two pairs of intersecting lines are : and ,
Question 4. How many lines can pass though:
(a) one given point?
(b) two given points
Answer: (a) Infinite number of lines can pass through one given point.

(b) Only one line can pass through two given points.

(b) Only one line can pass through two given points.
Question 5. Draw a rough figure and label suitably in each of the following cases:
(a) Point P lies on
(b) and intersect at M.
(c) Line contains E and F but not D.
(d) and meet at O.
Answer:




Question 6. Consider the following figure of line . Say whether following statements are true or false in the context of the given figure:

(a) Q, M, O, N, P are points on the line .

(a) Q, M, O, N, P are points on the line .
(b) M, O, N are points on a line segment .
(c) M and N are end points of line segment .
(d) O and N are end points of line segment .
(e) M is one of the end points of line segment .
(f) M is point on ray .
(g) Ray is different from ray .
(h) Ray same as ray .
(i) Ray is not opposite to ray .
(j) O is not an initial point of and .
Answer: (a) True, (b) True, (c) True, (d) False, (e) False, (f) False, (g) True, (h) False, (i) False, (j) False, (k) True