Hustrative Mathematics
Lesson 1: A Different kind of Change
Cool Down: 100 Meters of Fencing
A rectangular yard is enclosed by 100 meters of fencing. The table shows some possible
values for the length and width of the yard.
length (meters) width (meters) area (square meters)
10
40
400
20
30
25
25
625
35
15
525
40
1. Complete the table with the missing values.
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