Hello Mike! This is thunderlord
I have a question on page 171 number 20- In the figure above, a wheel is rolling from left to right without slipping or changing direction. Can you please explain the content of the question and your answer? Thank you so much

When a wheel rolls a complete revolution without slipping, it travels one circumference. You can see from the figure that the wheel in this question travels 18 units when it makes one revolution, so the circle’s circumference is 18.

You also know that the angle you care about, xº, is the smaller of the two angles that make up the circle, and it corresponds to 8 of the 18 circumference.

160 = x