2AF=AB=BD=DE=AE

of triangular
region CDE（）

单项选择题Board A measures between 2.15 feet and2.25 feet in length；board B measures between 2.20 feet and 2.30 feet in length． （）

A、 if the quantity in Column A is greater;
B、 if the quantity in Column B is greater;
C、 if the two quantities are equal;
D、 if the relationship cannot be determined from the information given.

单项选择题The diameter of the circle is 10． The area of the （）

A、 if the quantity in Column A is greater;
B、 if the quantity in Column B is greater;
C、 if the two quantities are equal;
D、 if the relationship cannot be determined from the information given.