The three interior angles of any triangle always add up to 180 degrees.
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In a triangle, the sum of the angles is always 180 degrees. This is known as the angle sum property of triangles. Additionally, the largest angle in a triangle is always opposite the longest side, and the smallest angle is opposite the shortest side.
The three angle sum of ANY triangle is 180 degrees.
It's not. It's 180o.
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It is 1/2 of length x width