please help me i really need it geometry?

Answer:
height= 30 area= 2160
Step-by-step explanation:
I don't think this is even right, but since a triangle adds up to 180, subtract the 72 and both 39's from 180. that should give you 30, the missing number (the height)
Then, to find area the formula is a=b*h
You already have the base in the image and you already calculated the height
Again, I don't know if this is right. It's not the same as how I do it here
Answer:
h = 15, A = 540
Step-by-step explanation:
Since the 2 legs are congruent then h is a perpendicular bisector, dividing the triangle into 2 right triangles.
Using Pythagoras' identity on one of the right triangles
with leg 72 ÷ 2 = 36 and hypotenuse = 39
h² + 36² = 39²
h² + 1296 = 1521 ( subtract 1296 from both sides )
h² = 225 ( take square root of both sides )
h = [tex]\sqrt{225}[/tex] = 15
Then
A = [tex]\frac{1}{2}[/tex] × 72 × 15 = 36 × 15 = 540 mi²