Question 1040045
congruent means the corresponding sides are the same.
similar means the corresponding sides are proportional.
proportional means the ratio of the old sides to the new sides is the same for all corresponding sides.


here's some references.


congruent triangles:
<a href = "https://www.mathsisfun.com/geometry/triangles-congruent.html" target = "_blank">https://www.mathsisfun.com/geometry/triangles-congruent.html</a>


similar triangles:
<a href = "https://www.mathsisfun.com/geometry/triangles-similar.html" target = "_blank">https://www.mathsisfun.com/geometry/triangles-similar.html</a>