similarity
They are said to be similar shapes and have the same interior angles.
If they are the same shapes but differ only in size, then they are SIMILAR shapes. Otherwise, they are simply different shapes.
Providing that they have the same angles they are said to be similar shapes
Rocks are not the same because, they come from either a Volcano, or they are broken from the Earth's ground. So this causes it to be different shapes and sizes.
Congruent
similarity
... are said to be congruent.
similar shapes are shapes that have the same angles but are different sizes.
They are said to be similar shapes and have the same interior angles.
If they are the same shapes but differ only in size, then they are SIMILAR shapes. Otherwise, they are simply different shapes.
Organelles is a possible answer.
Providing that they have the same angles they are said to be similar shapes
Cells are different shapes and sizes because they have different functions. The functions dictate the shapes and sizes.
No, the sizes and shapes of the continents do not directly correspond to the sizes and shapes of tectonic plates. Tectonic plates are larger and different in shape compared to the continents they contain. Continental plates can span multiple tectonic plates and vice versa.
No, they come in all shapes and sizes
For the same reason that humans come in different colors, shapes, and sizes. All birds are unique.