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Gengold
on FreezingBlue Flashcards.
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Isosceles Triangle
- - Two sides are the same length
- - The two angles facing those sides are the same length
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Equilateral Triangle
- - All interior angles are 60
- - All sides are the same length.
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Right Triangle
- - Contain a 90o angle
- - Puthagorean Theorem a2 + b2 = c2
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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
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Isosceles Right Triangle
- Ratio: 1 : 1 : √2
- Perimeter = 2x + x√2
 - √2 = 1.4
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30-60-90 Right Triangle
- Ratio: 1 : √3 : 2
- Perimeter= x + 2x + x√3
√3 = 1.7
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