Complete the sentence

A triangle is equilateral if ____ sides are the same length.

No
All 3
At least 2
Only 2

All 3

A triangle is equilateral if all 3 sides are the same length.

To complete the sentence, "A triangle is equilateral if ___ sides are the same length," the correct answer is "All 3."

Explanation:
To determine if a triangle is equilateral, you need to make sure that all three sides are of equal length. An equilateral triangle is a special type of triangle where all three sides are equal in length.