Well the answer options are a bit confusing but the steps are 1, 2, & 3.
The Tenth number percentage
180 °- 121°
= 59°
the answer is 59°
Two planes intersect at a line. Not a point.
You can change the denominators so they are alike.
Not sure how there can be two possible answers unless you're mentioning the decimal form:
.775
Tell me if this helps!!