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4) m/ABN= 20°, m/NBC = 12x + 16, and m/ABC = 14x + 12. Find m/ABC. i got 7 the first time but apparently it's incorrect because the angle 14x + 12 should be 189​

4) m/ABN= 20°, m/NBC = 12x + 16, and m/ABC = 14x + 12. Find m/ABC. i got 7 the first time but apparently it's incorrect because the angle 14x + 12 should be 189​
asked 86.4k views
3 votes
4) m/ABN= 20°, m/NBC = 12x + 16, and m/ABC = 14x + 12. Find m/ABC.

i got 7 the first time but apparently it's incorrect because the angle 14x + 12 should be 189​

4) m/ABN= 20°, m/NBC = 12x + 16, and m/ABC = 14x + 12. Find m/ABC. i got 7 the first-example-1
asked
User Tim Ferrill
by
8.2k points

1 Answer

5 votes

Answer:

Hi,

Explanation:


m\angle ABN+m\angle NBC+m\angle ABC=360\\\\20+12x+16+14x+12=360\\\\26x=360-20-16-12\\\\26x=312\\\\x=12\\\\m\angle ABC=14*12+12=180\\

answered
User Oinak
by
8.0k points
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