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The triangle below has a total perimeter of 450 cm. Write an equation and solve it to find the length of the longest side of the triangle.
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The triangle below has a total perimeter of 450 cm. Write an equation and solve it to find the length of the longest side of the triangle.

User Pseudosudo
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So you have 2 sides of a triangle known whose perimeter is 450 and you want to know the length of the third side?

128 + 150 + x = 450

278 + x = 450

x = 450 - 278

x = 172. Makes a heck of a lot more sense to me than 2.15
User Jonas Kongslund
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