Chapter

Coordinate Geometry

Highlights

EXERCISE

Type - 2
Question 1 :

For what value of x are the points A(-3,12),  B(7,6) and  C(x,9) collinear?

Formulae used :

Distance Formula to find distance between two points (x1,y1) and (x2,y2) is :                                                D = √[(x2 – x1)2 + (y2 – y1)2 ]

Solution :
Sol. (i) Here x1 = 2, y1 = 3, x2 = 4 and y2 = 1
         ∴ The required distance
         
Class Work
Q.1.   Find the distance between the  following pairs of points:
      (i)   (2, 3), (4, 1)
     (ii)   (–5, 7), (–1, 3)
     (iii)  (a, b), (–a, –b)
Q.1.   Find the distance between the  following pairs of points:
      (i)   (2, 3), (4, 1)
     (ii)   (–5, 7), (–1, 3)
     (iii)  (a, b), (–a, –b)
Q.1.   Find the distance between the  following pairs of points:
      (i)   (2, 3), (4, 1)
     (ii)   (–5, 7), (–1, 3)
     (iii)  (a, b), (–a, –b)
Answer
(i) 5 m
(i) 5 m
(i) 5 m
Assignment
Q.1.   Find the distance between the  following pairs of points:
      (i)   (2, 3), (4, 1)
     (ii)   (–5, 7), (–1, 3)
     (iii)  (a, b), (–a, –b)
Answer
(i) 5 m
(i) 5 m
(i) 5 m
NCERT Questions
Q1. Find the zeroes of the following quadratic polynomials and verify the relationship between the zeroes and their coefficients:
(i) x2 – 2x – 8
(ii) 4s2 – 4s + 1
(iii) 6x2 – 3 – 7x
(iv) 4u2 + 8u
(v) t2 – 15
(vi) 3x2 – x – 4
Answer
(i) 5 m
(i) 5 m
(i) 5 m
CBSE Questions

Q1. For what values of k are the points A(8,1),  B(3,-2k) and   C(k,-5) ?

Answer
(i) 5 m
(i) 5 m
(i) 5 m
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