P(-2,-6), Q(6,9) and R(1, -3) are the vertices of a triangle. Find the number of units by which the length of PQ exceeds the length of QR. Please I need your help. ^ Thanks. time: 4h.
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So use Pythagoras to find the length PQ, the length QR, and see how much longer it is...
it was more simple than I thought xD thanks
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