EXERCISE 4.1.
1) Using the figure to name:
a) Five points
Ans: O, B, C, D, E
b) a line
Ans: DB , many such lines are there like DE , ED , DB, etc
c) Four rays
Ans: OC , OB , OE , OD
d) Five line segments
Ans: DE , DO , DB , EO , EB
2) Name the line given in all possible (twelve) ways choosing only two letters at a line from the four given
Ans: AB , AC , AD , BA, BC , BD , CA, CB ,CD ,DA DB and DC.
3) Name the following:
a) A line containing point E
Ans: AE
b) line passing through A
Ans: AD
c) Line on which o lies
Ans: CO
d) Two pairs of intersecting lines
Ans: CO and AE AE and FE
4) How many lines can pass through
a) One given point?
Ans: Infinite or countless
b) Two given points
Ans: Only one
5) Draw a rough figure and give a suitable label for each of the following ones:
a) Point P lies on AB
Ans:
b) Ray XY and ray PQ intersect at M
Ans:
c) Line l contains E and F but not O
Ans:
d) Ray OP and OQ meet a O
Ans:
6) Consider the following figure of line MN Say whether following statements are true or false in context of the given figure
a) Q, M, O, N, P are points in the line MN
Ans: True
b) M, O, N are end points of line segment MN
Ans: True
c) M and N are end points of line segment MN
Ans: True
d) O and N are end points of line segment OP
Ans: False
e) M is one of the end points of line segment QO
Ans: False
f) M is point on ray OP
Ans: False
g) Ray (OP) is different from ray QP
Ans: True
h) Ray (OP) is same as ray OM
Ans: False
i) Ray (OM) is not opposite to ray OP
Ans: False
j) O is not an initial point of ray OP
Ans: False
k) N is the initial point of ray NM and ray NM
Ans: True