In the diagram, $PQ=4$ cm, $QR=6$ cm, $\angle QSR=55{}^\circ$ and $\angle RQS=60{}^\circ$. F

Question

In the diagram, $PQ=4$ cm, $QR=6$ cm, $\angle QSR=55{}^\circ$ and $\angle RQS=60{}^\circ$. Find the length of $PR$, correct to $3$ significant figures, the area of $\Delta QRS$, correct to $3$ significant figures.

Accepted Answer

(i) $8.72\text{ cm}$ (ii) $17.2\text{ cm}^2$

Determining Geometric Variables using Cosine Ratios

Determining Geometric Variables using Cosine Ratios

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