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Minchanka [31]
3 years ago
9

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

Mathematics
2 answers:
Paha777 [63]3 years ago
6 0
60+x+9=2x then solve for x. x=69
plug in 69 to the exterior angle which is 2x. 2(69)=138°
irakobra [83]3 years ago
5 0
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
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