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Perimeter of a Rectangle - Side from Perimeter and Side Ratio (Fractional) as Variables (Level 1)

This math topic focuses on calculating the unknown side length of a rectangle when given the perimeter and the ratio (as a fraction) of the sides. It introduces the concept as part of a broader unit on Area and Perimeter Logic. The problems challenge learners to apply algebraic knowledge and logical reasoning to solve for 'x', which represents a side of the rectangle, using given dimensions and perimeter information. This topic is suitable for students beginning to explore area, perimeter, and algebraic expressions in the context of geometric shapes.

Work on practice problems directly here, or download the printable pdf worksheet to practice offline.

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Rectangle - Side from Perimeter and Side Ratio (Fractional) as Variables

Complete these online problems with 80% or 4 correct answers in a row. Results are immediate.


Solve for 'x', given this rectangle's dimensions

P = 18xx/2

Perimeter of a Rectangle - Side from Perimeter and Side Ratio (Fractional) as Variables Worksheet

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Math worksheet on 'Perimeter of a Rectangle - Side from Perimeter and Side Ratio (Fractional) as Variables (Level 1)'. Part of a broader unit on 'Area and Perimeter Logic - Practice' Learn online: app.mobius.academy/math/units/area_and_perimeter_geometry_logic_practice/
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Solve for 'x', given this rectangle's dimensions
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4
b
6
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5
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1
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3
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9
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An svg image showing a math problem
Solve for 'x', given this rectangle's dimensions
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5
b
8
c
1
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3
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6
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9
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An svg image showing a math problem
Solve for 'x', given this rectangle's dimensions
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12
b
3
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4
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10
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7
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8
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An svg image showing a math problem
Solve for 'x', given this rectangle's dimensions
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10
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11
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8
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6
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15
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12
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An svg image showing a math problem
Solve for 'x', given this rectangle's dimensions
a
9
b
6
c
14
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4
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2
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8
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An svg image showing a math problem
Solve for 'x', given this rectangle's dimensions
a
2
b
14
c
15
d
6
e
5
f
13
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An svg image showing a math problem
Solve for 'x', given this rectangle's dimensions
a
8
b
10
c
6
d
1
e
2
f
11