The diagram below shows a circle of radius
cm
inscribed in a triangle of base cm and height
cm. Find an expression for the area,
in cm^{2}, of the shaded
region given that the area of a circle is given by . What is
the degree of your area expression?

- A The expression , and it is of the second degree.
- B The expression , and it is of the first
degree.
- C The expression , and it is of the first
degree.
- D The expression , and it is of the second
degree.