Abcd is a rhombus if c = 40 degrees. find the measure of all the angles of rhombus
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in rhombus opposite angles are equal,so
let b=x
d=x
a+b+c+d=360
40+40+x+x=360
2x=360-40+40=280
x=280÷2=140
a=40
b=140
c=40
d=140
let b=x
d=x
a+b+c+d=360
40+40+x+x=360
2x=360-40+40=280
x=280÷2=140
a=40
b=140
c=40
d=140
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