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Two questions testing the application of the Sine Rule when given two angles and a side. In this question, the triangle is always acute.
", "licence": "Creative Commons Attribution 4.0 International"}, "statement": "Suppose that $\\Delta ABC$ is a triangle with all interior angles less than $90^{\\circ}$. Sides and angles are labelled as shown in the diagram below (not to scale).
\nGiven the following two angles and a side length, determine the other two side lengths and the angle. Write down the side lengths as whole numbers and the angle correct to the nearest degree.
\n\n", "advice": "We use the Sine Rule to find $b$: $\\dfrac{a}{\\sin A}=\\dfrac{b}{\\sin B}$. Thus $b=\\dfrac{a \\sin B}{\\sin A}\\approx\\var{b0}$.
\nSince $A+B+C=180$, we calculate $C=180-A-B=\\var{CC2}$.
\nWe use the Sine Rule to find $c$: $\\dfrac{a}{\\sin A}=\\dfrac{c}{\\sin C}$. Thus $c=\\dfrac{a \\sin C}{\\sin A}\\approx\\var{c0}$.
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\nSide length $b=$ [[0]]
\nAngle $C=$ [[1]]$^\\circ$
\nSide length $c=$ [[2]]
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