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ruslelena [56]
3 years ago
8

Which one is correct ?

Mathematics
1 answer:
olga55 [171]3 years ago
3 0

Give the two exterior angles of 133 and 142, we can deduce that the interior angles are 47 and 38, respectively. In fact, if i and e are the interior and exterior angles, respectively, we have

i=180-e

Now, the interior angles of a triangle sum up to 180 degrees. Since we already have angles of 47 and 38 degrees, the missing angle is

180-47-38=95

Which implies

n=180-95=85

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