The congruence symbol was invented by Gottfried Leibniz.
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= with a ~ on top of it ~ = ≅
Three vertical parallel lines: |
Dilation - the image created is not congruent to the pre-image
No, congruent triangles are always similar but similar triangles and not always congruent. Imagine that similar triangles can be created on a copy machine enlarge and shrink the image, turn it, even turn it over, the angles remain the same. A congruent triangle must be exactly the same as the original. Hope this helps!
opposite sides are congruent corresponding parts of congruent triangles are congruent(apex)