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I am so confused, please help!!

∠1 and ∠2 are supplementary angles. m∠1= 11a+19. m∠2 = 6a – 9. Find m∠2.

3 answers

supplementary angles add up to 180 degrees.
So ....

11a+19 + 6a – 9 = 180

carry on

your answer should be
a = 10
m<2 = 6(10) -9
m<2 = 51 degrees

geometry is so dumb

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