A boat has two sails in the shape of right triangles, labeled A and B in the figure below.

A sailboat with sail A and sail B. Both sails are shaped like triangles.

The three sides of sail A are each half the length of the three sides of sail B. How do the areas of the two sails compare?
The area of sail A is One-half the area of sail B.
The area of sail A is One-fourth the area of sail B.
The area of sail A is One-sixth the area of sail B.
The area of sail A is One-eighth the area of sail B.