1. Find the value of k, if the distance between the points (1, 4), (k, 1) is 5.
(a) 3 or 5
(b) –3 or 5
(c) 3 or –5
(d) None of these

2. The points whose coordinates are (2, 2), (6, 3), (4, 11) forms
(a) a isosceles triangle
(b) a right angle
(c) scalene triangle
(d) an equilateral

3. The following points A (–1, 0), B (3, 1), C (2, 2) and D (–2, 1) taken in order form a
(a) rectangle
(b) parallelogram
(c) square
(d) None of these

4. The following points (3a, 0), (0, 3b), (a, 2b) forms a
(a) straight line
(b) triangle
(c) equilateral triangle
(d) None of these

5. The points A(–1, 4), B(5, 2) are the vertices of a triangle of which C(0,–3) is centroid, then the third vertex C is
(a) 4, 15
(b) 4, –15
(c) –4, –15
(d) None of these

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