Properties of Similar Triangles
Move point A, B or C to create any triangular shape.
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Triangle DEF is similar to triangle ABC.
What makes them similar?[br]
Use point E to create create other triangles similar to triangle ABC.
What do you observe is changing? Not changing?
Write out the measures of the following:[br][br] angle A angle D[br] angle B angle E[br] angle C angle F[br][br] AB DE[br] AC DF[br] BC EF[br]
angle A angle D[br] angle B angle E[br] angle C angle F[br][br] AB DE[br] AC DF[br] BC EF[br]
What do you notice about the angle measures?
Do you notice anything about the lengths of the sides?
Try writing out ratios and see if you can create proportions. Write these proportions here.
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Information: Properties of Similar Triangles