Question

classify the triangle below by angles. 100° obtuse isosceles acute right

Explanation:

Step1: Recall angle - based triangle classification

A triangle is classified by its angles as follows:

• Acute triangle: All angles are less than \(90^{\circ}\).
• Right triangle: One angle is equal to \(90^{\circ}\).
• Obtuse triangle: One angle is greater than \(90^{\circ}\) and less than \(180^{\circ}\).

Step2: Analyze the given angle

The given triangle has an angle of \(100^{\circ}\). Since \(100^{\circ}>90^{\circ}\) and \(100^{\circ}<180^{\circ}\), this triangle meets the criteria for an obtuse triangle.

Answer:

Obtuse