Use the diagram to identify the four regions of the earthworm. Dorsal side:

Ventral side:

Anterior end:

Posterior end:
Use the proportion of the triangle enlargement to find the missing measure of the enlarged triangle.

1. Set up the proportion: StartFraction 9 over 6 EndFraction = StartFraction x over 16 EndFraction
2. Use cross product: 9(16) = 6x
3. Simplify:
144 =
4. Divide:
= x