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Defining line-length
Find the definition for the line-length function and consider the code you see.
1 What do you Notice?
2 What do you Wonder?
Using line-length
Click Run, and practice using line-length in the Interactions Area with different values for a and b.
3 What does the line-length function do?
4 Why does it use conditionals?
5 Why is the distance between two points always positive?
These materials were developed partly through support of the National Science Foundation, (awards 1042210, 1535276, 1648684, 1738598, 2031479, and 1501927). 
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