If triangle ABC has a 130 degrees angle at vertex cap b , which statement must be true?
A
m angle cap A is equal to 15 degrees and m angle cap c is equal to 35 degreesB
m angle cap A plus m angle cap c is equal to 50 degreesC
m angle cap A plus m angle cap b is equal to 180 degreesD
m angle cap A is equal to 20 degrees and m angle cap c is equal to 20 degrees