Question 1149553
The coordinates of the vertices of ∆PQR are P (0,4), Q (4,0), and R (8,4)

Determine whether ∆PQR is a right triangle.
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Find the lengths of the 3 sides, a, b & c.
Call the longest side c.
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If c^2 = a^2 + b^2 it's a right triangle.