ACB is an exteriors angle ofABC .B=40.A=70. find the measure of Acd
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Angle sum property
let the unknown angle be x
so, 40+70+x=360
110+x=360
x=360-110
x=250
let the unknown angle be x
so, 40+70+x=360
110+x=360
x=360-110
x=250
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