Answer:
BCA = 130
Explanation:
FGE = 50
FGE + GEC + ECG = 180
50 +90 + ECG = 180
140 + ECG = 180
Subtract 140 from each side
140-140 + ECG = 180-140
ECG = 40
ECG and BCJ are vertical angle, so they are equal
JCA and GEC are corresponding angles so they are equal
We are looking for BCA
ACJ + BCJ = BCA
ACJ + BCJ = BCA
90 + 40 = BCA
130 = BCA