Fabio is trying to show his teacher why the product of two rational numbers is another rational number. His first steps are shown. Which is the best method Fabio could use to proceed?

other answer is correct. i had used the radius of the radius somehow. a website:

"exterior angles = 360 / number of sides.

60 = 360 / sides

sides = 360 / 60

sides = 6"

step-by-step explanation:

this can be solved first with pythagorean theorem, which tells us to square both legs of the triangle and sum it. this will be equal to the square of the hypotenuse.

the hypotenuse is the side "opposite" the 90 degree angle, which is x.

so we can write using pythagorean theorem,

simplifying:

to further simplify this radical, we need to use the property  

thus