◎ Similar to xiāngsì √.

[similar; Be similar; Similar] similar; be similar

Tapirs are similar to the sea -"Lu Chunqiu, Caution"

Triangle similarity

[Edit this paragraph]

If two graphs are equal in shape, they are similar, but not necessarily equal in size.

Note: congruence is a special similarity.

The following methods can prove that these two graphs are similar:

1. Two angles of two triangles are equal.

2. The two sides are proportional and the included angle is equal.

3. Three sides are in direct proportion

Matrix similarity

[Edit this paragraph]

Let A and B be two N-level matrices over the number field P. If the N-level invertible matrix X over the number field P can be found so that B = x (- 1) ax, A is similar to B and is denoted as A ~ B. ..

Similarity relation is equivalent relation between matrices.

The linear transformation matrices under different bases are similar; On the other hand, if the matrices are similar, they can be regarded as matrices corresponding to the same linear transformation under two different bases.