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Module 1 · Learning to Drive

Lesson 5 · The Polygon Function — Knowledge ChecksAnswer key

Correct answers are marked and the explanation follows each question.

  1. What turn angle will polygon compute for a 12-sided shape (a dodecagon)?

    1. A.12°
    2. B.30°✓
    3. C.36°
    4. D.90°

    The function calculates 360 ÷ 12 = 30° on its own — no need to work it out by hand.

  2. polygon (8, 25) traces an octagon about 2 m around. What does polygon (8, 50) do?

    1. A.A different shape
    2. B.The same octagon shape, but about twice as big (~4 m around)✓
    3. C.An octagon at double speed
    4. D.Nothing changes

    Doubling side_length doubles each side, so the perimeter doubles — but the angles (and therefore the shape) stay the same.

  3. Without a general polygon function, you'd write one function each for square, triangle, pentagon, hexagon, and octagon. With polygon, how many functions do you need?

    1. A.Five
    2. B.One✓
    3. C.One per shape you draw
    4. D.Three

    That's the power of generalizing: a single well-designed function replaces all the special-case ones.