Exercise 4.1
1Find the HCF of the following:
(i)24 and 36
Prime factorisation of 24 : 2x2x2x3
Prime factorisation of 36 : 2x2x3x3
HCF - 2x2x3 =
(ii) 15, 25 and 30
Prime factorisation of 15: 3 x 5
Prime factorisation of 25: 5 x 5
Prime factorisation of 30: 2 x 3 x 5
HCF - 5 =
- Use the figure to name :
(a) Five points:
(b) A line:
(c) Four rays:
(d) Five line segments:
- Name the line given in all possible (twelve) ways, choosing only two letters at a time from the four given?
= AB,
- Use the figure to name :
(a) Line containing point E:
(b) Line passing through A:
(c) Line on which O lies:
(d) Two pairs of intersecting lines:
- How many lines can pass through (a) one given point? (b) two given points
- Consider the following figure of line MN or false in context of the given figure.
Q, M, O, N, P are points on the line MN
M, O, N are points on a line segment MN.
M and N are end points of line segment MN
O and N are end points of line segment OP.
M is one of the end points of line segment QO.
M is point on ray OP
Ray OP is different from ray QP.
Ray OP is different from ray QP.
Ray OP is same as ray OM.
Ray OM is not opposite to ray OP.
O is not an initial point of OP.
Nis the inital point of NP and NM.
True
False