Answer: 171
Step-by-step explanation:
An obtuse angle means more than 90 degrees. (90 degrees would be the inside corner of your notebook paper) a straight line would be 180 degrees. 171 is the closest to 180
Answer:
12
A² + B² = C²
9² + B² = 15²
81 + B² = 225
B² = 144
B = 12
