Samacheer Kalvi 8th Maths Solutions Term 2 Chapter 2 Algebra Ex 2.3
Samacheer Kalvi 8th Maths Solutions Term 2 Chapter 2 Algebra Ex 2.3
Tamilnadu Samacheer Kalvi 8th Maths Solutions Term 2 Chapter 2 Algebra Ex 2.3
Question 1.
Fill in the blanks:
Question (i)
X – axis and Y – axis intersect at ……..
Answer:
Origin (0, 0)
Question (ii)
The coordinates of the point in third quadrant are always ……….
Answer:
negatives
Question (iii)
(0, -5) point lies on ………. axis.
Answer:
y – axis.
Question (iv)
The x coordinate is always ……… on the y – axis.
Answer:
Zero
Question (v)
Coordinates are the same for a line parallel to Y – axis.
Answer:
X.
Question 2.
Say True or False:
Question (i)
(-10, 20) lies in the second quadrant.
Answer:
True
Hint:
(-10, 20)
x = – 10,
y = 20
∴ (- 10, 20) lies in second quadrant – True
Question (ii)
(-9, 0) lies on the x – axis.
Answer:
True
Hint:
(-9, 0) on x – axis, Y – coordinate is always zero.
∴ (-9, 0) lies on x – axis – True
Question (iii)
The coordinates of the origin are (1, 1).
Answer:
False
Hint:
Coordinate of origin is (0, 0), not (1, 1). Hence – False
Question 3.
Find the quadrants without plotting the points on a graph sheet.
(3, -4), (5, 7), (2, 0), (- 3, – 5), (4, – 3), (- 7, 2), (- 8, 0), (0,10), (- 9, 50).
Solution:
- If x & y coordinate are positive – I quad
- If x is positive, y is negative – IV quad
- If x is negative, y is positive – II quad
- If both are negative, then – III quad
Question 4.
Plot the following points in a graph sheet.
A(5, 2), B(- 7, – 3), C(- 2, 4), D(- 1, – 1), E(0, – 5), F(2, 0), G(7, – 4), H(- 4, 0), 1(2,3), J(8, – 4) K (0, 7).
Solution:
Question 5.
Use the grid graph to determine the coordinates where each figure is located.
a) Star ……..
b) Bird ……..
c) Red Circle ……..
d) Diamond ……..
e) Triangle ……..
f) Ant ……..
g) Mango ……..
h) Housefly ……..
i) Medal ……..
j) Spider ……..
Solution:
a) Star (3, 2)
b) bird (-2, 0)
c) Red Circle (-2, -2)
d) Diamond (-2, 2)
e) Triangle (-1, -1)
f) Ant (3, -1)
g) Mango (0, 2)
h) Housefly (2, 0)
i) Medal (-3, 3)
j) Spider (0, -2)
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