Question

which names describe the triangle? choose yes or no for each name. acute right obtuse equilateral isosceles scalene

Explanation:

Step1: Recall triangle classification definitions

• Acute triangle: All angles < \(90^{\circ}\).
• Right triangle: One angle = \(90^{\circ}\).
• Obtuse triangle: One angle > \(90^{\circ}\).
• Equilateral triangle: All sides equal.
• Isosceles triangle: At least two sides equal.
• Scalene triangle: All sides different.

Step2: Analyze the given triangle

From the visual, it has one right angle ( \(90^{\circ}\) ). So it is a right triangle. Also, two sides seem equal (right - angled isosceles), so it is isosceles.

Answer:

• acute: No
• right: Yes
• obtuse: No
• equilateral: No
• isosceles: Yes
• scalene: No