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ΔDOG and ΔRUN are similar triangles. Determine the perimeter of each triangle. ΔDOG = ______ units ΔRUN = ______ units
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5 to 15 is a factor of 3 so you multipy all sides by a factor of 3 to find the bigger triangles missing side and divide by a factor of 3 to find the small one's missing side. The big one's missing side is 30 and the small one's is 7, that means DOG has a perimeter of 66 and the small one 22.
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