30 60 90 triangle formula geometry

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Calculus

30-60-90 Triangle Rules & Sides

As shown in the figure above, two congruent 30-60-90 triangles, ACD and BCD, share a side along their longer leg. Since ∠BCD = ∠ACD = 30°, ∠BCA = 60°. Also ∠CAD = ∠CBD = 60°, therefore
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