Let r represent the radius of the circle...?

Question

Let r represent the radius of the circle, X the central angle (measured in radians), and s the length of the arc are subtended by the angle. Use the relationship s = rX to complete the table.

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r | 8ft | 85 cm | blank 1 | blank 2

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s | blank 1 | blank 2 | 96 in. | 8642 mi.

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X | blank 1 | 1.6 | 3pi/4 | 2pi/3

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This is so confusing. Any help would be appreciated.

Answer 1

The first column poses a problem since there are two blanks.

For the others, you have s = r X

In column 2, use that directly to compute s.

In column 3, r is missing, so

change the equation to r = s / X

In column 4, same thing.

If the value for s were there in column 1,

you would use X = s / r

.