Problem: A triangle is circumscribed about a circle of radius r inches. If the perimeter of the triangle is P inches and the area is K square inches, then P/K is:
Answer Choices:
A. independent of the value of r
B. 2​/r
C. 2/r​
D. 2/r
E. r/2
Solution:
Let the sides of the triangle, in inches, be a,b, and c. Then