What is the area of a triangle with the following vertices L(1, 3), M(5, 1), and N(2, 5) ?
Pick:	A) 3	B) 4	C) 5	D) 6	E) 7
There is a direct formula to calculate the are of a triangle based on coordinates of its vertices and one could use it to solve this problem.   Though if you make a diagram minimum simple calculations will be needed:   Answer: 5.
<result>C</result>
What is the area of a triangle with the following vertices L(1, 3), M(5, 1), and N(2, 5) ?