Geometrymedium · Past Paper
In triangle ABC, if angle A=40 and angle B=80, find the ratio of sides BC:AC:AB.
A1:2:3
Bsin 40 : sin 80 : sin 60
C40 : 80 : 60
Dcos 40 : cos 80 : cos 60
✓ Correct Answer: B — sin 40 : sin 80 : sin 60
According to the Sine Rule, the ratio of sides is equal to the ratio of the sines of their opposite angles. Third angle is 60.
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