zee41
zee41
28-06-2017
Mathematics
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May you help me with this please ?
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konrad509
konrad509
28-06-2017
[tex]r=\dfrac{|AB|}{2}\\ r=\dfrac{\sqrt{(12-4)^2+(5-9)^2}}{2}\\ r=\dfrac{\sqrt{64+16}}{2}\\ r=\dfrac{\sqrt{80}}{2}\\ r=\dfrac{4\sqrt5}{2}\\ r=2\sqrt5[/tex]
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