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4 years ago

Theorem of triangle I Prove theorems about triangles I cbse maths I part- #3

Easy learning
Triangles: Class 9 cbse maths.
Theorem-1
The sum of the angles of a triangle is 180 degree.
Theorem-2
If a side of a triangle is produced, then the exterior angle so formed is equal to the sum of the two interior opposite angles.

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