Step-by-step explanation:
The two triangles are similar because if you take the ratio of their legs, they are the same. Note that
[tex]\dfrac{\overline{CE}}{\overline{CD}} = \dfrac{6}{2} = 3[/tex]
For the other triangle,
[tex]\dfrac{\overline{CB}}{\overline{CA}} =\dfrac{12}{4} = 3[/tex]
As you can see, they have the same ratio therefore the two triangles are similar.
