AminaArdekani AminaArdekani

07-06-2017
Mathematics

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The angles of a triangle are 80º, 2x + 2º, and 5xº. What is the value of x?

(I'm a K12 STUDENT TAKING A SEMESTER TEST)

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JoshEast JoshEast

07-06-2017

Since the sum of the angles of a triangle = 180°

Then 80º + (2x + 2)º + 5xº = 180°
82° + (7x)° = 180°
(7x)° = 180° - 82°
x = 98° ÷ 7
∴ x = 14

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