I think it’s a because it says perimeter which means to add up all the sides but I could be wrong. I’m not really sure.
Answer: The answer would be D.
Step-by-step explanation: I put down the points then simply reflected it over the y-axis. I did this by using the the opposite of the x number and the same y number. Hope this helps!
Using the law of sines:
Sin (angle) = opposite leg / hypotenuse
Sin(30) = 14 /x
x = 14 * sin(30)
x = 28
