Chapter 9: Q7. (page 341)
At o’clock the hands of a clock form an angle of
Short Answer
The angle formed between the hands of the clock is
Chapter 9: Q7. (page 341)
At o’clock the hands of a clock form an angle of
The angle formed between the hands of the clock is
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The number of odd vertices will tell you whether or not a network can be traced without backtracking. Do you see how? If not, read on.
suppose that a given network can be traced without backtracking.
a. Consider a vertex that is neither the start nor end of a journey through this network. Is such a vertex odd or even?
b. Now consider the two vertices at the start and finish of a journey through this network. Can both of these vertices be odd? Even?
c. Can just one of the start and finish vertices be odd?
Find In Exercise is tangent to

Complete the tables in Exercises 10 and 11.


is tangent to and .

How many common external tangents can be drawn to the two circles?

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