What are the correct statement and reason for line 4 to complete the proof?

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Ответ:

naiajNan

23.12.2021

Mathematics

$25^{\circ}$

Step-by-step explanation:

The sum of the interior angles of a triangle is equal to 180 degrees, and each side of a straight line is equal to 180 degrees. Therefore, the exterior angle labelled $150^{\circ}$ must be equal to the sum of the two angles marked $125^{\circ}$ and $?^{\circ}$ :

$125+x=150,\\x=150-125=\boxed{25^{\circ}}$

Thus, the missing angle is $25^{\circ}$ .

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