Set up a ratio:
10 foot tall elephant / X shadow length = 15 foot tall statue / 18 foot shadow.
Cross multiply:
10 * 18 = X * 15
Simplify:
180 = 15x
Divide both sides by 15:
x = 180 / 15
x = 12
The elephants shadow was 12 feet long.
Answer:
A. 
Step-by-step explanation:
Applying the leg rule which is:

Hypotenuse = 4 + 8 = 12
Leg = x
Part = 8
Plug in the values

Cross multiply





Answer:
right triangle
Step-by-step explanation:
Notice it has a right angle (90º) in its corner. Therefore, it is a right triangle.
Right triangles look like this: ⊿