Which types of triangles have rotational symmetry?
a. scalene triangle
c. right triangle
b. equilateral triangle
d. isosceles triangle

An isosceles triangle could have rotational symmetry if it were also an equilateral triangle. An isosceles triangle is a triangle with at least two equal sides. An equilateral triangle is a triangle with exactly three equal sides. By definition, all equilateral triangles are also isosceles triangles.

It would be an equilateral triangle .it could also be an isosceles triangle but the rotational symmetry would have to be 2.

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It's like discovering the answer to a puzzle. the purpose in solving an equation is to find the value or values of the variable that makes it a true statement. any value of the variable that makes the equation true is called a solution to the equation.