ANSWER

EXPLANATION
We determine the slope of each line using the slope formula;

The slope of BC is


The slope of AB is


The two lines are perpendicular so the product of their slopes is -1.

This implies that,




.
Answer:
$8.25
Step-by-step explanation:
I don't know how to explain it to you but if I'm wrong tell me I'll try it aagain.
THE AREA IS 20 UNITS BECAUSE IF YOU DIVIDE IT INTO 2 SQUARES, THE FIRST ONE IS 4*3=12. THE SECOND ONE IS 2*4=8.
12+8=20.
HOPE THIS HELPED☺☺