The answer is 65° because 115° and another number has to add up to 180°
Answer:

Explanation:
If a side has a bracket [] then it is less than or equal to, meaning that it can reach that exact number.
However, if a side has a parentheses () then it is simply less than. It cannot be that exact number, but it can be even slightly less than that number.
multiply the first fraction by the second one
which is
1/4 times 1/2 equals 1/8