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OpenStudy (anonymous):
1. EDC is similar to ADB. If AD = 12 cm, DB = 8.4 cm, AB = 17.4 cm, and ED = 7.8 cm, what is the measure of EC?
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OpenStudy (anonymous):
This is a ratio problem. Since the triangles are equal, the corresponding sides have the same ratio. With x equal to the measure of EC,\[\frac{12}{7.8}=\frac{17.4}{x}\]You should be able to solve this.
OpenStudy (anonymous):
Correction: Since the triangles are similar.....
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