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Prove angle sum property

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Prove angle sum property

Posted by Kritika Bhatt 8 years, 7 months ago

CBSE > Class 09 > Mathematics

2 answers

Tanya Zanzad 8 years, 7 months ago

ABC is any triangle Now draw line DE through point A such that it is parallel to BC Proof : DE || BC And AB is transversal . :: DAB=ABC -------alternate angle -------1 Taking DE || BC and AC is transversal :: EAC = ACB-------alternate angle --------2 Now, DAB. ABC

2Thank You

Yogya Aggarwal 8 years, 7 months ago

If we have triangle abc is an isosceles AB=BC given AB= AC ( GIVEN) angle A +B+C =180degree Liner pair A+ A+A =3A 3A = 180 A=B=C=60DEGREE

3Thank You

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CBSE > Class 09 > Mathematics

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Posted by Yash Pandey 9 months, 4 weeks ago

CBSE > Class 09 > Mathematics