Unit 4, Lesson 12
Approximating Pi
Geometry
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Technology required. The expression \(n \boldcdot \sin \left( \frac{360}{2n} \right)\) approximates \(\pi\) by giving the perimeter of a regular polygon inscribed in a circle with radius 1.
Select all true statements.
\(AC=\sqrt{119}\) units
\(AC=13\) units
\(\cos(\theta) = \frac {5}{12}\)
\(\sin(\alpha) = \frac{12}{13}\)
\(\theta=\arctan \left(\frac{5}{12}\right)\)
Write 2 equations using sine and 2 equations using cosine based on triangle \(ABC\).