All triangles equal 180 degrees.
The correct answer is A, it has -1. While B's got 1.
Percent decrease=(decrease)/(original) converted to percent
change=120 to 52
120-52=68
change or decrease=68
original=120
68/120=0.5666666=56.6666%
about 57%
Answer:
C
Step-by-step explanation:
Use the equation 
Input the numbers----> 
Simplify ----> 
Find the square root------->