Referenced from lesson Solving Word Problems (Spring, 2021)
Write the contracts used to create each of the following collections of examples.
1
examples:
big-triangle(100, "red") is
triangle(100, "solid", "red")
big-triangle(200, "orange") is
triangle(200, "solid", "orange")
end
2
examples:
purple-square(15) is
rectangle(15, 15, "outline", "purple")
purple-square(6) is
rectangle(6, 6, "outline", "purple")
end
3
examples:
banner("Game Today!") is
text("Game Today!", 50, "red")
banner("Go Team!") is
text("Go Team!", 50, "red")
banner("Exit") is
text("Exit", 50, "red")
end
4
examples:
twinkle("outline", "red") is
star(5, "outline", "red")
twinkle("solid", "pink") is
star(5, "solid", "pink")
twinkle("outline", "grey") is
star(5, "outline", "grey")
end
5
examples:
half(5) is 5 / 2
half(8) is 8 / 2
half(900) is 900 / 2
end
These materials were developed partly through support of the National Science Foundation,
(awards 1042210, 1535276, 1648684, and 1738598). 
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