Hi,
there are a few coordinate geometry problems giving me trouble:
1. "The vertices of a right triangle are S(-2,-2), (T(10, -2), and R(4,5). Find the area of the triangle."
(I got 42 square units as the answer but the book says the answer is actually 36 square units...)
2. What type of triangle do the vertices A(4, 2), B(-2, -2) and C(2, -8) belong to? Determine the answer without plotting the points on a graph.
a) scalene
b) isosceles
c) equilateral
3. The coordinates of the endpoints of the diameter of a circle are (6,4) and (-2,0). Find the length of the radius of the circle.
Thanks!