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One
method of doing some quick practice with your students is to use
the angles formed by the hands of a clock. |
You can easily
construct some facsimiles of a clock face using cardboard and a small
plate
(or
anything circular, for that matter).
After the clock face is constructed,
have students attach the hands of the clock using a
center pin
(or
whatever that thing is called)
as in the
pictures below.
Possible
questions to the class might be:
-
What
type of angle is formed when you place the hands of the clock on the 3
and the 12 ?
-
Give
me an example of a time of day when the hands of the clock form a
straight angle.
-
Be
careful with this idea---you could be questioned by one of the more
astute students in the group about the actual degree measure of the
angle formed at 3:30 for example. Although we would probably
want them to say this is a right angle, in actuality, because when the
clock reads 3:30 the hour hand is past the three, it is an acute
angle. This could also, however, lead to an interesting class
discussion.
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