How is being 'similar' different from being 'congruent'?
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Congruent means being exactly the same. When two line segments have the same length, they are congruent. When two figures have the same shape and size, they are congruent.
[Figure 1]
These two triangles are congruent. They are exactly the same in every way. They are the same size and the same shape. Their side lengths are the same and that their angle measures are the same.
Sometimes, two figures will be similar. Similar means that the figures have the same shape, but not the same size. Similar figures are not congruent.
[Figure 2]
These two triangles are similar. They are the same shape, but they are not the same size.
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