| Estimate
a distance of 21 feet. Then measure a distance
of 21 feet. How accurate was
your estimate?
Place a small object, such as
a penny, on a sheet of cardboard. Lift
one end of the cardboard. How
high must you raise the cardboard before the penny begins
to slide? If the sheet of cardboard were longer,
could you lift the end higher without making the penny
slide?
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Measure the height and tread
width of one step in your home, school, or business.
Find the slope of the stairs containing the step (the
ratio of the height to the tread width).
Is there a skateboard ramp
near your home? If so, estimate the slope
of the ramp.
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