Prove that angle some properties of triangle.
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The sum of all internal angles of a triangle is always equal to 180. This is called the angle sum property of a triangle. The sum of the length of any two sides of a triangle is greater than the length of the third side. The side opposite to the largest angle of a triangle is the largest side.
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sum of all angles of triangle= 180°
Explanation:
sum of all angles of triangle=180°
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