Which type of triangle will always have exactly 1-fold reflectional symmetry? a. right triangle b. obtuse triangle c. equilateral triangle d. isosceles triangle
Mathematics · Middle School · Mon Jan 18 2021
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c. equilateral triangle
An equilateral triangle is a triangle in which all three sides are of equal length and all three angles are congruent (each angle is 60 degrees in the case of an equilateral triangle). An equilateral triangle will always have exactly 1-fold reflectional symmetry because you can fold it along the line connecting any vertex to the midpoint of the opposite side, and the two halves will match perfectly.