1. **State the problem:** We need to classify the given triangle based on its side lengths and angles. 2. **Analyze the triangle:** The triangle has one right angle (indicated by the small square), so it is a right triangle. 3. **Classify by angles:** Since it has a right angle, it is a **right** triangle (option E). 4. **Classify by sides:** Two sides are marked equal (two lines), and the third side is different (one line), so it is an **isosceles** triangle (option B). 5. **Summary:** The triangle is **right** and **isosceles**. No other classifications apply because: - It is not scalene (scalene means all sides different). - It is not acute (all angles less than 90°). - It is not obtuse (one angle greater than 90°). - It is not equilateral (all sides equal). Final classification: **isosceles** and **right**.