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Mathematics 7 Online
OpenStudy (yinshy):

What is the measure of ∠ACB?

OpenStudy (yinshy):

A. 73° B. 51° C. 63° D. 12°

OpenStudy (yinshy):

OpenStudy (yinshy):

B

563blackghost (563blackghost):

You would add the two known angles and then subtract them by 180... \(\Huge{180-(78+39)}\)

OpenStudy (yinshy):

so C

563blackghost (563blackghost):

Yup

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