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# Area and Perimeter of Triangles

## Area is half the base times the height while the perimeter is the sum of the sides.

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Practice Area and Perimeter of Triangles
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Perimeter of Equilateral Triangle ABC
Teacher Contributed
ABC$\triangle ABC$ is equilateral with AB=9x+9$AB = -9 x + 9$, and BC=2x+86$BC = -2 x + 86$. What is the perimeter of ABC$\triangle ABC$?
qid: 100147