Question

help plez

Answer 1

help me i need to know how they got this answer

Answer 2

the measures of <C and <B are the consecutive interior angles, they will sum 180 degrees. let the measure of <BCA is x, so
40+x+80=180
solve for x

Answer 3

ang=angle
ang ADC is 80
inside the parallelogram all angles added equal to 360
so ang ADC + ang ABC =160
360-160=200
other two ang are reciprocal and when added equal to 200
so 200/2=100
ang ACD=40
ang BCD=100
so ang BCA= angBCD-angACD
angBCA =60

Answer 4

thnks yall