Question

which triangle has 0 reflectional symmetries?

Explanation:

Step1: Recall reflectional symmetry concept

Reflectional symmetry means a figure can be divided into two congruent parts by a line (axis of symmetry).

Step2: Analyze equilateral triangle

An equilateral triangle (the second - like triangle in the middle) has 3 axes of symmetry.

Step3: Analyze isosceles right - triangle (the third - like triangle)

An isosceles right - triangle has 1 axis of symmetry (the line that bisects the right angle and is perpendicular to the hypotenuse).

Step4: Analyze scalene right - triangle (the first - like triangle)

A scalene right - triangle (all sides of different lengths) has 0 axes of symmetry.

Answer:

The first - like triangle (scalene right - triangle) has 0 reflectional symmetries.