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In ∆QRS, q =370 cm, r =910 cm and
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In ∆QRS, q =370 cm, r =910 cm and

User Anshita Singh
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using cosine rule


\begin{gathered} s^2=r^2+q^2-2rq\cos S \\ s^2=910^2+370^2-2*910*370\cos 31 \\ s^2=828100+136900-336700*0.8571673007 \\ s^2=965000-288608.230146 \\ s^2=676391.769854 \\ s=\sqrt[]{676391.769854} \\ s=822.430404262 \\ s=822\operatorname{cm} \end{gathered}

In ∆QRS, q =370 cm, r =910 cm and-example-1
User Palme
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