Question

classify the following triangle. check all that apply. a. equilateral b. acute c. obtuse d. isosceles e. right f. scalene

Explanation:

Step1: Recall triangle - type definitions

An equilateral triangle has all sides equal and all angles equal to 60°. This triangle has all angles 60°, so it is equilateral.

Step2: Recall angle - based triangle definitions

An acute - angled triangle has all angles less than 90°. Since all angles are 60° (less than 90°), it is acute.

Step3: Recall side - based triangle definitions

An isosceles triangle has at least two sides equal. An equilateral triangle is a special case of an isosceles triangle, so it is isosceles.

Answer:

A. Equilateral
B. Acute
D. Isosceles