Question

Find the value of x.

45


60


90


80

Answer 1

90

Explanation:

Answer 2

Explanation:

The formula you want is x°=
`(1)/(2)`(major arc - minor arc)

If the minor arc is 90, and all the way around the outside of a circle is 360 degrees, that means that the major arc measures 360 - 90 = 270. Filling in our formula:

x°=
`(1)/(2)`(270 - 90)

or

x° =
`(1)/(2)`(180)

That gives us that x is a right angle at 90°