Question

Please help!!

Use Heron’s Area Formula to find the value of “x” in the triangle with the given measures. Area = 21.3
[A] x=7.6
[B] x=7
[C] x=8.7
[D] x =5.9

Answer 1

Answer:

the answer is B, x=7

Step-by-step explanation:

heron's area formula:

$s = \frac{a + b + c}{2}$

$area = \sqrt{s(s - a)(s - b)(s - c)}$