Q. 12

# Show that the □PQ

According to the distance formula, the distance 'd' between two points (a,b) and (c,d) is given by .....(1)

Slope of a line between two points (a,b) and (c,d) is Note: If the Product of slopes of two lines = -1 then they are perpendicular to each other.

PQ = = QR = = RS = = SP = = Slope PQ = Slope QR = Slope RS = Slope SP = As opposite sides are equal and parallel and perpendicular to each other, points form a rectangle.

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