a. 9 cm 2 because each side would be 3 and length x width would be 3 x 3 = 9
Answer:
7√2
Step-by-step explanation:
After one hour, the plane is 225 miles from its destination
From this picture you can calculate coordinates of triangles' vertices:

.
Since
you can conclude that points A, B, C are rotated by

about the point (-0.5,0) to form points J, G, H, respectively.
Answer: A is correct choice.