4th Grade Math Topic 15 Problem Solving using measurement

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Rectangle
A shape with parallel sides. The length of opposite sides is the same. The width of opposite sides is the same.

Why is a square always a rectangle, but a rectangle is not always a square?
Equivalent
Having the same value
Area
The surface inside a figure or shape; especially : the number of unit squares equal to the amount of space the surface covers

The area of a rectangle can be found by multiplying the length and the width. Area = l x w
Perimeter
The boundary of a shape or area. The rim around a shape or area.

The perimeter of a rectangle can be found by adding the two lengths and two widths of the shape. Perimeter = l + l + w + w OR 2l + 2w
Interval
A number that is the difference between 2 consecutive numbers on the scale of a graph.
Line Plot
A graph that shows the frequency of data along a number line
Scale
a series of spaces marked by lines and used to measure distances or to register something (as the height of the mercury in a thermometer)
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