Kermit: The domain of gt is Number, String, String.
Oscar: The domain of gt is Number.
Ernie: I’m not sure who’s right!
In order to make a triangle, we need a size, a color and a fill style…
but all we had to tell our actor was gt(20)…and they returned triangle(20, "solid", "green").
Please help us!
1 What is the correct domain for gt?
2 What could you tell Ernie to help him understand how you know?
These materials were developed partly through support of the National Science Foundation,
(awards 1042210, 1535276, 1648684, and 1738598). 
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