If the end points of a diameter of a circle are A(-2, 3) and B(4, -5) then the coordinates of its centre are

1. (2, -2)

2. (1, -1)

3. (-1, 1)

4. (-2, 2)

If one end of a diameter of a circle is (2,3) and the centre is (-2, 5), then the other end is

1. (-6, 7)

2. (6, -7)

3. (0, 8)

4. (0, 4)

If the mid-point of the line segment joining the points P(a, b - 2) and Q(-2, 4) is R(2, -3), then the values of a and b are

1. a = 4, b = -5

2. a = 6, b = 8

3. a = 6, b = -8

4. a = -6, b = 8

The points A(9, 0), B(9, 6), C(-9, 6) and D(-9, 0) are the vertices of a

1. rectangle

2. square

3. rhombus

4. trapezium