Question 38

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waecmaths question: 

If the perimeter of ΔPQR in the diagram is 24cm, what is the area of ΔPRS?

Option A: 

19.5cm2

Option B: 

15.0cm2

Option C: 

13.0cm2

Option D: 

9.3cm2

waecmaths solution: 

$\begin{align}  & \vartriangle PQR \\ & 6cm+8cm+\left| PR \right|=24cm \\ & \left| PR \right|=10cm \\ & Area\text{ of }\vartriangle PRS=\frac{1}{2}\times b\times h=\frac{1}{2}\times 10\times 3c{{m}^{2}}=15c{{m}^{2}} \\\end{align}$

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