### Home > INT3 > Chapter 8 > Lesson 8.1.1 > Problem8-18

8-18.

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

 Column I Column II a. $x =\frac { - b \pm \sqrt { b ^ { 2 } - 4 a c } } { 2 a }$ 1. Law of Cosines b. $\frac { \operatorname { sin } ( A ) } { a } = \frac { \operatorname { sin } ( B ) } { b }$ 2. Area of a triangle c. $c^{2} = a^{2} + b^{2}$ 3. Pythagorean Theorem d. $c^{2} = a^{2} + b^{2} – 2ab\text{cos}\left(C\right)$ 4. Quadratic Formula e. $A=\frac{1}{2}ab\text{sin}\left(C\right)$ 5. Law of Sines

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