Question

1. equilateral means

all sides are equal
measure
all angles are equal
measure
two sides are equal
measure
no sides are equal
measure

Explanation:

An equilateral triangle is defined as a triangle where all three sides are of equal length. By the properties of equilateral triangles, if all sides are equal, all angles are also equal (each 60°), but the fundamental definition of "equilateral" refers to the equality of side lengths. The option "All angles are equal" is a consequence of all sides being equal (due to the isosceles triangle theorem extended to all sides), but the term "equilateral" directly relates to side equality. "Two sides equal" is isosceles, and "no sides equal" is scalene. So the correct definition for equilateral is all sides being equal.

Answer:

A. All sides are equal measure