Answer:
C. Reflection
Step-by-step explanation:
Hope it helps!
I believe it is 55°.
I can't remember the exact steps for this tho.
I hope it is right! good luck!
Find the value of any expressions (within) parentheses first. Then evaluate all powers. Then multiply or (divide) from left to right, and finally add or (subtract) from left to right.
sum of interior angles of triangle are 180°.