The true statement about shapes a and b is "Similar - shape b has been dilated, so the shapes are similar but not congruent."
What is the shape of a and b?
Shape a and b are two-dimensional, flat-shaped, closed geometric figure, made of four sides and four angles. The interior angles are equal to 90 degrees, and the sides are parallel to each other.
1. "Not similar-shape b has been stretched, these shapes are neither similar nor congruent." implies that shape B has been stretched, and as a result, shapes A and B are not similar (they don't have the same shape) and not congruent (they don't have the same size and shape).
2. "Similar-shape b has been dilated, so the shapes are similar but not congruent." implies that that shape B has been dilated (enlarged or reduced proportionally), and as a result, shapes A and B are similar (they have the same shape) but not congruent (they don't have the same size).
The true statement about shapes a and b is "Similar - shape b has been dilated, so the shapes are similar but not congruent."