Triangles

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The flashcards below were created by user Gengold on FreezingBlue Flashcards.

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