Question 19

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waecmaths question: 

In $\Delta XYZ$ $\left| XY \right|=8cm,$$\left| YZ \right|=10cm$and $\left| XZ \right|=6cm$ which of theses relations is true?

Option A: 

$\left| XY \right|+\left| YZ \right|=\left| XZ \right|$

Option B: 

$\left| XY \right|-\left| YZ \right|=\left| XZ \right|$

Option C: 

${{\left| XZ \right|}^{2}}={{\left| YZ \right|}^{2}}-{{\left| XY \right|}^{2}}$

Option D: 

${{\left| YZ \right|}^{2}}={{\left| XZ \right|}^{2}}-{{\left| XY \right|}^{2}}$

waecmaths solution: 

Option C

maths year: