A triangle is a closed, three-sided polygon. The sum of the interior angles of a triangle is always 180 degrees.
There are several types of triangles based on their side lengths and angles:
Here are some important formulas related to triangles:
The Triangle Inequality Theorem states that the sum of the lengths of any two sides of a triangle must be greater than the length of the third side. In other words, for a triangle with sides a, b, and c, where c is the longest side, the following inequality holds: a + b > c
Triangles also have several geometric properties, such as the altitude, median, and centroid, which are important for solving various problems.
Now that you've learned about triangles, try solving the following practice problems:
Good luck with your triangle studies!
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