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verify that an exterior angle of a triangle is equal to sum of its interior opposite angles

Posted by Vajeeha Anjum 7 years, 11 months ago

CBSE > Class 09 > Mathematics

1 answers

Swarnim Kamal 7 years, 11 months ago

Take interior angles be a,b,c and exterior angle be d Now angle a+b+c =180(angle sum property) - 1 And c+d=180(L.P)-2 From 1&2 a+b+c=c+d =a+b=d Hence proved

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CBSE > Class 09 > Mathematics

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CBSE > Class 09 > Mathematics