Question

Bob says that he can find the area of the triangle below using the formula: A = %7B2%7D" id="TexFormula1" title="\frac{1}{2}" alt="\frac{1}{2}" align="absmiddle" class="latex-formula"> * 8 *18 * sin (120°). Is he correct? Explain why or why not.

Answer 1

Answer:

No.

Step-by-step explanation:

No, Bob is not correct.

The formula he's using is the following:

$A=\frac{1}{2} ab\sin(C)$

The important thing here is that the angle is between the two sides.

In the given triangle, 120 is not between 8 and 18. Therefore, using this formula will not be valid.

Either Bob needs to find the other side first or find the angle between 8 and 18.