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Use of Algebraic Expressions in Formula of Perimeter of Figures

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Question

Question 29

Fill in the blanks to make the statement true.

The unlike terms in perimeters of following figures are _ and _.

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Solution

In Fig.(i),
Perimeter = Sum of all sides
= 2x + y + 2x + y = 4x + 2y
In Fig.(ii),
Perimeter = Sum of all sides
$= x + y^{2} + x + y^{2} = 2 x + 2 y^{2}$
$∴$ Unlike terms in perimeters are 2y and $2 y^{2} .$

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Use of Algebraic Expressions in Formula of Perimeter of Figures

Standard VII Mathematics

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