Question on: WAEC Mathematics - 2005
From a point P, R is 5km due west and 12km due south. Find the distance between P and R
A
5km
B
12km
C
13km
D
17km
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Correct Option: C
Using Pythagoras theorem
\(|PR|^2=|PO|^2+|OR|^2\
|PR|^2=5^2+12^2\
|PR|=\sqrt{25+144}=\sqrt{169}=13km\)
\(|PR|^2=|PO|^2+|OR|^2\
|PR|^2=5^2+12^2\
|PR|=\sqrt{25+144}=\sqrt{169}=13km\)
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