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  1. 45 45 90 Triangle. Calculator | Formula | Rules

  2. Special right triangles intro (part 1) (video) | Khan Academy

  3. 45-45-90 Triangle - Rules, Formula & Theorem - Tutors.com

  4. 45°-45°-90° Triangle: Properties, Formulas, Construction

  5. How to solve 45-45-90 triangles - Krista King Math

  6. 45-45-90 triangle - Math.net

  7. Special right triangles proof (part 2) (video) | Khan Academy