Prove That the three sides of the triangle equal to 180°
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keep smiling..
Step-by-step explanation:
Since angle DAB, plus BAC, plus CAE, equals 180. Then because these angles, alternate interior angles are congruent, and these alternate interior angles are congruent, that means that the three angles inside of our triangle also add to be 180 degrees.
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for example:
Equilateral triangle: each side is 60 degree.
60*3 = 180
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