54 
A right triangle is a shape that looks like half of a square. The height of the triangle is 12, and the base of the triangle is 9. To find the area, use the following formula:
A =

=

=

= 54
Answer:
divide
Step-by-step explanation:
Answer:
Track 2
Step-by-step explanation:
180 degrees would turn the train completely around so if it entered on track 2 then it left on track 2