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Learning Goal
Part of: Right Triangles and Trigonometry — 2 of 6 skill_area items
Special right triangles: 45-45-90 and 30-60-90
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What you'll learn
- State the side ratios for 45-45-90 triangles (1 : 1 : sqrt(2)) and 30-60-90 triangles (1 : sqrt(3) : 2)
- Derive the 45-45-90 ratio by cutting a unit square along its diagonal
- Derive the 30-60-90 ratio by bisecting an equilateral triangle
- Find any missing side of a special right triangle given one side
- Solve SAT-style problems that embed special right triangles in larger figures
Prerequisites
Slides
Interactive presentations perfect for visual learners • In development
Slides
In development
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Exercises
Practice problems to build fluency and understanding • 1 exercises