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musiclover10045

the 3 angles of a triangle need to equal 180 degrees

 50 +70 = 120


180 - 120 = 80

 the 3rd angle = 80 degrees


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fichoh

Using the theorem for the sum of the interior angles of a triangle, the measure of the third angle would be 60°

Given the Parameters :

  • Angle 1 = 50°
  • Angle 2 = 70°

Recall :

A + B + C = 180° (Sum of the interior angles of a triangle)

50 + 70 + C = 180

120 + C = 180

C = 180 - 120

C = 60°

Hence, the measure of the third angle is 60°

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