Question

which statement describes the order of rotational symmetry for an isosceles triangle? an isosceles triangle has an order 0 rotational symmetry because there is no angle at which it can be rotated onto itself. an isosceles triangle has an order 1 rotational symmetry because it does not have all congruent angles. an isosceles triangle has an order 2 rotational symmetry because it has 1 pair of congruent angles. an isosceles triangle has an order 3 rotational symmetry because it has 3 angles.

Explanation:

The order of rotational symmetry of a shape is the number of times it can be rotated around a central point and still look the same as the original shape. An isosceles triangle looks the same as the original only when rotated by 360° (a full - turn), which means its order of rotational symmetry is 1.

Answer:

An isosceles triangle has an order 1 rotational symmetry because it does not have all congruent angles.