Answer:
FACTS
Explanation:
sietori
A cultural boundary (also cultural border) in ethnology is a geographical boundary between two identifiable ethnic or ethnolinguistic cultures.
A=25
C=105
B= 50
A+B+C= 180
75+ C = 180
C= 180_75 = 105
A+105 = 130
A= 130 -105=25