(a) P(1,0). Q(2,-5), R(-3, -5)
What triangle is this

This is a scalene obtuse triangle

An obtuse triangle is a triangle with an angle greater than 90 degrees,  A scalene triangle is a triangle that has three different side lengths.  You can find the side lengths(2,3,sqrt6) by plotting the triangle and using Pythagorean theorem.  It is also visually clear that the triangle is obtuse if it is plotted.

Hope it helps <3

the answer is 5636.7