60 90 30 triangles degree work Day 1 hw special right triangles 45 45 90, 30 60 90 Special right triangles (fully explained w/ 19 examples!)
mathcounts notes: Special Right Triangles: 30-60-90 and 45-45-90
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A full guide to the 30-60-90 triangle (with formulas and examples
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Special right triangles
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