I WONDER - What Do The Angles Add Up To In A Triangle?

The video explains how to determine the third angle in a triangle by knowing that the sum of all angles is 180 degrees. It provides an example where two angles add up to 70 degrees, making the third angle 110 degrees. The video also discusses the relationship between the sides and angles of a triangle, noting that the longest side is opposite the largest angle, and the shortest side is opposite the smallest angle. In right-angled triangles, the longest side is called the hypotenuse, which is opposite the right angle.

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