Non-Right Angled Trigonometry: The Sine Rule for Area

Non-Right Angled Trigonometry: The Sine Rule for Area

Secondary 3

Triangle \(XYZ\) is such that \(XY=15.8\) cm, \(YZ=28.4\) cm and \(\angle YXZ=74{}^\circ \).
Calculate

\(\angle XZY\),
the area of\(\Delta XYZ\).

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Answer:(i) \(32.3^\circ\) (ii) \(215\text{ cm}^2\)

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