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Maths Exercices
Distance from a point to a line

The formula that gives the distance between a point A=(m,n) and a line r:ax+by+c=0 is:

Find the distance from point A(4,1) to the line r:2x-y+4=0



Find the distance from the point A=(4,1) to the line that goes through the points P=(0,8) and Q=(-4,5)

D =