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LiRa [457]
3 years ago
11

Angle Sum Theorem

Mathematics
1 answer:
kondaur [170]3 years ago
3 0

Answer:

20 degrees

Step-by-step explanation:

sum of interior angles:

180 = 70 + 70 + 2x

solve for x,

180 = 140 + 2x ---> 2x = 40 or. x = 20

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