So the answers 3,000 cause it said period i mean unit period
I think it’s A and it’s B at the most but still...A
A square's area is the square of the sides
square area= side²
side=

side=

side=

OR we can divide it
|_

x²|_

x⁴|_

4x⁴|_
Doesn’t let me in the link?
Use trigonometry.
sin x = opposite ÷ hypotenuse
sin x = 7/9
Take the arcsin on both sides.
arcsin(sin x) = arcsin(7/9)
x = 51.057558731
Rounding to the nearest whole number means to round to the ones place.
Answer: x = 51 degrees