Triangle RST, with vertices R(2,3), S(6,7), and T(4,8), is drawn inside a rectangle, as
shown below.
10
9
T
00
8
2
6
6
V
5
3
4
R
2
-2
-1
2
3
4
5
8
9
10
What is the area, in square units, of triangle RST?
