In the diagram, E is the centroid of \triangle ABC. AD = 7.5 centimeters, AD \perp BC and AE \cong BD Calculate the perimeter of \triangle ABC. The perimeter of \triangle ABC is approximately _______ centimeters.
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We know that E is the centroid of triangle ABC. This means that AE is twice as long as ED. So, AE = 2ED. Show more…
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