Final answer:
When given 2 angles in a triangle, you can find the third angle by subtracting their sum from 180 degrees. Trigonometry can be used to solve for a side length if more information is known about the triangle.
Step-by-step explanation:
When encountering a triangle with 2 angles given, you can find the third angle by subtracting the sum of the two given angles from 180 degrees. This is because the sum of all the angles in a triangle is always 180 degrees. For example, if one angle is 60 degrees and another angle is 30 degrees, the third angle would be 180 - (60 + 30) = 90 degrees.
If you have more information about the triangle, such as the lengths of the sides, you can also solve for a side length using trigonometry. Trigonometric ratios like sine, cosine, and tangent can be used to relate the angles and sides of a right-angled triangle. By setting up the appropriate equation and substituting the known values, you can solve for the unknown side length.