In the diagram below, $BC$ is 8 cm. In square centimeters, what is the area of triangle $ABC$?
WHAT diagram?
1/2 base x height = 1/2 * 8 * 10 = ........ cm2
8*10/2 is 40.
If dotted lines form the right angle, then the area of a triangle ABC is: A = 8*10 / 2
thank you guys!
