find angle a,b and c
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Step-by-step explanation:
4b+70+b =180 because it's straight angle
so
5b+70=180
5b=180-70=110
b=110/5
b= 22
4b and a are vertically opposite angles so
a=4b =4*22= 88
same way 70+b and 2c are vertically opposite angles
so 70+b =2c
70+22=2c
2c=92
c=92/2= 46
c=46
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