NCERT Solutions For Class 8 Maths Chapter 15 Ex 15.2
Question 1:
Plot
the following points on a graph sheet. Verify if they lie on a line
(a)
A(4, 0), B(4, 2), C(4, 6), D(4, 2.5)
(b)
P(1, 1), Q(2, 2), R(3, 3), S(4, 4)
(c)
K(2, 3), L(5, 3), M(5, 5), N(2, 5)
Answer:
(a) We
can plot the given points and join the consecutive points on a graph paper as follows.
From
the graph, it can be observed that the points A, B, C, and D lie on the same line.
(b) We
can plot the given points and join the consecutive points on a graph paper as follows.
Hence,
points P, Q, R, and S lie on the same line.
(c) We
can plot the given points and join the consecutive points on a graph paper as follows.
Hence,
points K, L, M, and N are not lying on the same line.
Question
2:
Draw
the line passing through (2, 3) and (3, 2). Find the coordinates of the points
at which this line meets the x-axis and y-axis.
Answer:
Question
3:
Write
the coordinates of the vertices of each of these adjoining figures.
Answer:
The
coordinates of the vertices in the given figure are as follows.
O (0,
0), A (2, 0), B (2, 3), C (0, 3)
P (4,
3), Q (6, 1), R (6, 5), S (4, 7)
K (10,
5), L (7, 7), M (10, 8)
Question
4:
State
whether True or False. Correct those are false.
(i) A
point whose x coordinate is zero and y-coordinate is non-zero will lie on the y-axis.
(ii) A
point whose y coordinate is zero and x-coordinate is 5 will lie on y-axis.
(iii)
The coordinates of the origin are (0, 0).
Answer:
(i)
True
(ii)
False
The
point whose y-coordinate is zero and x-coordinate is 5 will lie on x-axis.
(iii)
True
