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Use of Algebraic Expressions in Formula of Perimeter of Figures

The perimeter...

Question

The perimeter of a triangle whose sides measure $2 a, b$ and $a + b$ is.......

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Solution

The perimeter of a triangle whose sides measure $2 a, b$ and $a + b$ is $2 a + b + a + b$ which is equal to $3 a + 2 b$

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