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How do you do this and what's the answer?

How do you do this and what's the answer?-example-1
User Bjorninn
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1 Answer

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The triangle is isosceles, so the base angles are both x°. The angles add to 180° as with any triangle.
.. x° +x° +30° = 180°
.. 2x = 150
.. x = 75 . . . . . . . . . . . . . corresponds to selection D
User Heroxav
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