Triangles

Card Set Information

Author:
Gengold
ID:
54607
Filename:
Triangles
Updated:
2010-12-09 13:17:37
Tags:
GRE Triangles
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Description:
Triangles
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  1. Isosceles Triangle


    • - Two sides are the same length
    • - The two angles facing those sides are the same length
  2. Equilateral Triangle


    • - All interior angles are 60
    • - All sides are the same length.
  3. Right Triangle


    • - Contain a 90o angle
    • - Puthagorean Theorem a2 + b2 = c2
  4. 3-4-5 Right Triangle
    sides always come in predictable ratios.



    • 32 + 42 = c2
    • 9 + 16 = c2
    • 25 = c2
    • 5 = c

    • 122 + b2 = 132
    • 144 + b2 = 169
    • b2 = 25
    • b = 5
  5. Isosceles Right Triangle
    • Ratio: 1 : 1 : √2
    • Perimeter = 2x + x√2

    • √2 = 1.4
  6. 30-60-90 Right Triangle
    • Ratio: 1 : √3 : 2
    • Perimeter= x + 2x + x√3

    √3 = 1.7

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