Triangle DEF has vertices D(4,2), E(6,5), and F(3,6). What is the area of triangle DEF?

4.5 square units
6 square units
5.5 square units
9 square units
12 square units

Triangle DEF has vertices D42 E65 and F36 What is the area of triangle DEF 45 square units 6 square units 55 square units 9 square units 12 square units class=