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Pythagoras Theorem

In a triangle...

Question

In a triangle $A B C$ , if $A B = 4$ and $A C = 3$ , what is the length of $B C$ ?

4

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5

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5.2

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6

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Solution

The correct option is A $5$
Using Pythagoras theorem, we will find $B C$ ,
$A B^{2} + A C^{2} = B C^{2}$
$4^{2} + 3^{2} = B C^{2}$
$16 + 9 = B C^{2}$
$B C = 5$

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