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Triangles
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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 a
^{2 }
+ b
^{2}
= c
^{2}
3-4-5 Right Triangle
sides always come in predictable ratios.
3
^{2}
+ 4
^{2}
= c
^{2}
9 + 16 = c
^{2}
25 = c
^{2}
5 = c
12
^{2}
+ b
^{2}
= 13
^{2}
144 + b
^{2}
= 169
b
^{2}
= 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
Author
Gengold
ID
54607
Card Set
Triangles
Description
Triangles
Updated
2010-12-09T18:17:37Z
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