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18-11-2020
Mathematics

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Noahpastasio Noahpastasio

18-11-2020

Answer:

A) 40

Step-by-step explanation:

exterior angle = 130 °

angles on a straight line add up to 180°

180 - 130 = 50

right angle = 90°

50 + 90 = 140

180 degrees in a triangle

180 - 140 = 40°

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