Respuesta :
Answer:
Order of rotational symmetry is 1.
Step-by-step explanation:
We know that an equilateral triangle has all its angle as 60° as all the sides of the triangle are similar.
The triangle is completely similar from all the vertices. Order of rotational symmetry is defined as the number of times the diagram or figure needs to be rotated so as to get back the original picture.
So here let the three vertices be A,B,C. When we rotate the figure once by 60° to get the next vertice we see that the obtained diagram is completely similar to the original one. So one rotation i sufficient to obtain the original figure hence the order is 1.
