prove that sum of angles of triangle is 2 right angle
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consider a ΔABC
extend all the sides of the Δ
suppose you extended AB to D ∠CBD+∠CBA=180°(linear pair)
in this way we get the same for all
∴180°=2(90)°
extend all the sides of the Δ
suppose you extended AB to D ∠CBD+∠CBA=180°(linear pair)
in this way we get the same for all
∴180°=2(90)°
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its cannot.....we should compair your equation to interior angles equation
if you draw a diagram and enclose that, it will be much better to understand your solution.
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