1. The problem is to analyze a triangle where angle B is given as 90 degrees. 2. Knowing that angle B is 90 degrees means the triangle is a right triangle with angle B as the right angle. 3. In a right triangle, the Pythagorean theorem applies: $$a^2 + b^2 = c^2$$ where $c$ is the hypotenuse opposite the right angle. 4. This information helps solve for unknown sides or angles using trigonometric ratios or the Pythagorean theorem. 5. If you provide side lengths or other angles, we can proceed to calculate missing values.