Question

Classify the following triangle

Answer 1

A triangle with all three sides of equal length: Equilateral
All three angles are acute angles (each angle = 60° and less than 90°)

Answer:
C. Equilateral
F. Acute

Answer 2

We can classify a triangle two ways, by its sides and by its angles. Let's start with sides. Since we see that all the sides are equal, we know that this is an equilateral triangle. No we can move onto the angles. Since it's an equilateral triangle, we know without looking that all of the angles are equivalent to 60°. Since this is an acute angles, we know that this triangle is an equilateral, acute triangle.