SOLUTION: The vertices of triangle PQR are P(1,3),Q(5,4) and R(5,15).find a)the length of PR b)the area of triangle PQR?

Question 770585: The vertices of triangle PQR are P(1,3),Q(5,4) and R(5,15).find a)the length of PR b)the area of triangle PQR?
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
QR would serve well as a base for the triangle. Same x component, just difference in y is 11 units. Sketch the graph on coordinate plane and see P is at x=1 while the base, QR is at x=5, so you can find the value of the altitude, . You now have enough to use area formula of , where b is the base, h is the height.

Area is
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