CPM Homework Help : INT3 Problem 8-18

Match the law, equation, or formula in Column I with its corresponding name from Column II.

Column I	Column II
$x =\frac { - b \pm \sqrt { b ^ { 2 } - 4 a c } } { 2 a }$	Law of Cosines
$\frac { \operatorname { sin } ( A ) } { a } = \frac { \operatorname { sin } ( B ) } { b }$	Area of a triangle
$c^{2} = a^{2} + b^{2}$	Pythagorean Theorem
$c^{2} = a^{2} + b^{2} – 2ab\text{cos}\left(C\right)$	Quadratic Formula
$A=\frac{1}{2}ab\text{sin}\left(C\right)$	Law of Sines

Answer (e):

$2$
If you do not have the rest of these memorized, work on doing so.