Question

1. classify the triangle based on the angles. right triangle acute triangle equilateral triangle obtuse triangle

Explanation:

Step1: Recall triangle - angle definitions

A right - triangle has one angle equal to 90 degrees. An acute - triangle has all angles less than 90 degrees. An equilateral triangle has all angles equal to 60 degrees (less than 90 degrees). An obtuse - triangle has one angle greater than 90 degrees.

Step2: Identify the angle in the given triangle

The given triangle has a right - angle (marked by the square symbol), which means one of its angles is 90 degrees.

Answer:

right triangle