MCQ Questions on Coordinate Geometry for Competitive Exams

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81.
A point in the 4th quadrant is a unit away from x-axis and 7 unit away from y-axis. The point is at:

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82.
A(7, -8) and C(1, 4) are vertices of a square ABCD. Find equation of diagonal BD?

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83.
An equation whose graph passes through the origin, out of the given equation 2x - 3y = 3, 2x + 3y = 2, -2x + 3y = 5 and 2x + 3y = 0 is:

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84.
The point P(a, b) is first reflected in origin to P1 and P1 is reflected in Y-axis to (4, -3). What are the co-ordinates of point P?

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85.
What are the co-ordinates of the centroid of a triangle, whose vertices are A(2, 5), B(-4, 0) and C(5, 4)?

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86.
The graphs of the equations $$4x + \frac{1}{3}y = \frac{8}{3}$$   and $$\frac{1}{2}x + \frac{3}{4}y + \frac{5}{2} = 0$$    intersect at a point P. The point P also lies on the graph of the equation:

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87.
For triangle PQR, find equation of altitude PS if co-ordinates of P, Q and R are (1, 2), (2, -1) and (0,5) respectively?

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89.
The point Q(a, b) is first reflected in y-axis to Q1 and Q1 is reflected in x-axis to (-5, 3). The co-ordinates of point Q are

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90.
The straight line y = 3x must pass through the point:

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