Your answer is C. Hope this help :D
For Perimeter you add all the sides of the figure and the total is your perimeter. For Area you multiply the length times the width.
The answer is below. X is greater than 8 and smaller than 24.
What does that mean cause I don't know if it is possibility
<span>The cosine of an angle is the quotient of the side that angle lay on and the hypotenuse.</span>
x-hypotenuse
cos45=19/x
0.707=19/x, x=19/0.707, x=26.9
Hypotenuse is <span>approximately 27.</span>
