Draw a picture of a rectangle that has a length of 5 units and a width of 7 units. Then explain why the area of the rectangle can be found by the computation 5 x 7 units².
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2. Draw a 3-cm-by-7-cm rectangle. Then discuss the difference in the units we attach to the 3 and the 7 in these two situations: When applying the rectangle area formula to determine the area of the rectangle. When viewing the rectangle as decomposed into equal groups of 1-cm-by-1-cm squares in order to apply the definition of multiplication. Use drawings to support your discussion.
Sri K.
Draw a 3-cm-by-7-cm rectangle. Then discuss the difference in the units we attach to the 3 and the 7 in these two situations: When applying the rectangle area formula to determine the area of the rectangle, and when viewing the rectangle as decomposed into equal groups of 1-cm-by-1-cm squares in order to apply the definition of multiplication. Use drawings to support your discussion.
Think About a Plan A rectangular wooden frame has side lengths $5 x$ and $7 x+1 .$ The rectangular opening for a picture has side lengths $3 x$ and $5 x .$ What is the area of the wooden part of the frame? Write your answer in factored form. How can drawing a diagram help you solve the problem? How can you express the area of the wooden part of the frame as a difference of areas?
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