Help pls! I need the answer quickly and pls explain. thank you!

h = 6

Step-by-step explanation:

The given is the special right triangle with angle measures : 90-60-30

and the side lengths for the given angles are represented by :

2a-a-a

the side length that sees 60 degrees is represented by a (h in this case)

the area of a triangle is calculated by multiplying height and base and that is divided by 2

a*a/2 = 18 multiply both sides by 2

a^2 = 36 divide both sides by

a^2 = 36 find the roots for both sides

a = 6

since h sees angle measure 60 and is represented by a

h = 6

in the attachment.   i didn't see your choices.   the word which means there is choices.

step-by-step explanation:

(x,y)

x tells you how much left or right you go from the origin

y tells you how much down or up you go from the origin

so for example (-3,2), you go left 3 and up twice. i denoted which of the ordered pairs is which in my graph.