Worksheet on arc length and sector area formulas with examples and diagrams.

A worksheet titled "Arc Length & Sector Area Notes" with a table listing formulas for circumference, arc length, area of a circle, and sector area, each with a corresponding picture and example. The worksheet includes a section at the bottom titled "Think about it..." asking about similarities between the formulas.

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Final Answer:
The similarities are:
- Both arc length and sector area formulas include the fraction $\frac{\theta}{360^\circ}$, which represents the portion of the full circle.
- Both use the radius $r$ (and for sector area, $r^2$).
- They are both based on the full-circle formulas: circumference $2\pi r$ and area $\pi r^2$.
These similarities exist because a sector is just a “slice” of the whole circle, so its length and area are proportional to the central angle $\theta$ out of 360°.

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