The incentre of the triangle with vertices A(1, $$\sqrt 3 $$), B(0, 0) and C(2, 0) is

If the three consecutive vertices of a parallelogram are ($$-$$2, $$-$$1), (1, 0) and (4, 3), then what are the coordinates of the fourth vertex?

What is the ratio in which the point $$C\left( { - {2 \over 7}, - {{20} \over 7}} \right)$$ divides the line joining the points A($$-$$2, $$-$$2) and B(2, $$-$$4)?

What is the equation of the straight line parallel to 2x + 3y + 1 = 0 and passes through the point ($$-$$1, 2) ?