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There is an equation that relates the diameter and circumference. The diameter is two times the radius. So you can rearrange the variables in the equation to find the part that is missing. …

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We usually start thinking about distances as straight lines. But distances can also be measured along curved lines, like the outside of a circle. You can think of rolling up a straight line to get …

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Focused mostly on arclength. The equation used is that for circumference. And then you figure out the fraction of the circle. Which could be any amount, sometimes it was 1/2 for a …

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We started by using SOHCAHTOA. One mistake was not including an argument of the function. Sin, cos, tan do not mean anything without an argument. So sinx, cosx, tanx, etc. Went over some ways to …