In fact, Frank could determine lots of information about each figure from inspection alone.
You try it. Use visual inspection to match the numbers on the left with their corresponding descriptions on the right.
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4 units
2 units
5 units
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The length of the longest side of the rectangle
The approximate length of the radius of the circle
The length of the longest side of the parallelogram
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You understand how to define points in a Cartesian coordinate plane, and you're familiar with the different quadrants. How can you use this information?