Audio and video pronunciation of Mathieu brought to you by Pronounce Names (http://www.PronounceNames.com), a website dedicated to helping people pronounce names correctly.
The interior angles of a triangle always add up to 180 degrees. If you make one angle bigger, another angle will become smaller: The exterior angles of a triangle always add up to 360 degrees: In every triangle, the shortest side is always opposite the smallest interior angle. The longest side is always opposite the largest interior angle. âOppositeâ means that the side does not touch the point of the angle on either end. Equilateral triangles must have three angles of 60 degrees each, and all triangles with three 60 degree angles are equilateral.
The triangle inequality theorem states that any side of a triangle is always shorter than the sum of the other two sides. Try this Adjust the triangle by dragging the points A,B or C. Notice how the longest side is always shorter than the sum of the other two. In the figure above, drag the point C up towards the line AB. As it gets closer you can see that the line AB is always shorter than the sum of AC and BC.