Question

PLZ HELP ME PLZ WILL SURELY MARK BRAINLIEST PLZ PLZ
HELP ME PLZ PLZ
in a quadrilateral ABCD angle A + angle C is 2 times angle B + angle D if angle A= 140 degree and angle D = 60 degree then angle B=

Answer 1

A+c=2{b+d}

140+c=2b+120

2b-c=20

in a quad a+b+c+d=360

b+c=160

frm above two eqns on adding we get

3b=180

b=60

c=100

dont frgt to mark as brainliest………

Answer 2

As per question A+C=2(B+D)
or, 140+C=2B+2×60
or, 2B--C=140-120
or,2B-C=20
or,C=2B-20
Now,A+B+C+D=360
or,140+B+2B-20+60=360
or,3B+180=360
or,3B=180
or,B=60