CBSE Class 9 Answered
Prove the sum of triangle is 180 degres
Asked by | 18 Sep, 2012, 05:19: AM
Expert Answer
Start with the following triangle with arbitrary values for the angles:
Since angle a, angle b, and angle c make a straight line,
angle a + angle b + angle c = 180 degrees
Since alternate interior angles are equal, angle a = angle x and angle b = angle y
Therefore, angle x + angle y + angle c = 180 degrees
angle a + angle b + angle c = 180 degrees
Since alternate interior angles are equal, angle a = angle x and angle b = angle y
Therefore, angle x + angle y + angle c = 180 degrees
Answered by | 18 Sep, 2012, 09:34: AM
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