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Example 1

The left side of the L below has a length of 2. Press the orange button to create a congruent L that will grow to be a similar L. Its left side will have a length of 4. The ratio of similitude will be 2:4.

 

The symbol for similar is

~

 

Example 2

The left side of the T below has a length of 2. Press the blue button to create a congruent T that will grow to be a similar T. Its left side will have a length of 6. The ratio of similitude will be 2:6.


Example 3

Notice that the T's below are congruent. When you click the button, the T on the right will shrink so that the T's will be similar. The T's will be in proportion.

The sides are in proportion. From top to bottom:

9:3, 3:1, 6:2

 

More on Alphabet Geometry

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