True or false opposite side aren't equal in length and why? Rectangle?

True. Opposite sides of a shape are not necessarily equal in length because the length of the sides can vary depending on the shape and its dimensions. In some shapes, such as rectangles or squares, opposite sides are equal in length, but in other shapes, such as parallelograms or trapezoids, opposite sides can be different lengths.

False.

Opposite sides of a parallelogram are always equal in length. This is because a parallelogram is defined as a quadrilateral with opposite sides parallel and equal in length.