M34 · Further applications 1 Trigonometry in general triangles mind map
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Recall link
Included angle: Higher: Area = ab sinC/2; 8,5,30° → 10 cm²
Find angle: Higher: sinC=2 area/(ab); consider C and 180°−C
Application 1
Bearings to angles: Use parallel north lines before selecting the triangle rule.
A diagonal in space: Project the space diagonal onto the base before finding its angle.
Connections
Recall link → Application 1: Interior angles and opposite sides determine the usable triangle rule
