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Similarity Condition: AA Triangle Similarity.
Transformation: Dilation
Similarity Condition: AA Triangle Similarity
Transformation: Translation, Dilation
Since two pairs of angles in the triangles have equal measures, we know the triangles are similar by the AA Triangle Similarity condition. We can map the blue triangle to the red triangle by performing a dilation of the smaller triangle of some unknown factor using the shared vertex as the point of dilation.
Note that we could also perform a dilation of the red triangle using the shared vertex as the point of dilation, but with a factor between 1 and 0.
Since the triangles have at least two angles with equal measures, they must be similar by the AA Triangle Similarity condition. We can map the blue triangle to the red triangle by first performing a translation of the smaller blue triangle so that two of their vertices lie on top of each other. Finally, we dilate the blue triangle to make all vertices line up.
Having identified corresponding sides we can write an equation. 6/15? =8/20? =11/33 By calculating the three ratios, we can determine if the triangles are similar 0.4= 0.4≠ 0.33... Since the ratio of the longest sides isn't equal to the ratio of the two other sides, these cannot be similar triangles.