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Find the measure of the exterior angle. (I'm assuming it's easy I'm just bad at math.)
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Find the measure of the exterior angle. (I'm assuming it's easy I'm just bad at math.)

Find the measure of the exterior angle. (I'm assuming it's easy I'm just bad at math-example-1
User Samkass
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2 Answers

11 votes
60+x+9=2x then solve for x. x=69
plug in 69 to the exterior angle which is 2x. 2(69)=138°
User Utsav Kesharwani
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9 votes
you will do area for a triangle . when multiplying with the (x+9) you will just multiply the number infront of the parentheses by both the x and the 9. for example the 60 would be 60(x+9) which would be 60x+540
User Legomolina
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