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Theory:
It is a \(3\) sided polygon. It is also the polygon with the least number of the sides.
Vertices: \(A\), \(B\) and \(C\) are common endpoint in triangle.
Sides: \(AB\), \(BC\) and \(CA\) are the ray forming the angles in triangle.
Angles: \(∠A\), \(∠B\) and \(∠C\) are a two ray which share a common endpoint.
A triangle is also associated with \(3\) parts:
- Interior of triangle is refers to the inside/inner area.
- Boundary of triangle is refers to the dividing line thus it divides the interior and exterior of the triangle
- Exteriorof triangle is refers to the outside / outer area.
Video: parts of a triangle |