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Acute triangles
a^2 + b^2 is greater than c^2
c is the longest side of the triangle

Obtuse triangles
a^2 + b^2 is less than c^2
 c is the longest side
100 + 289 is less than 441

Right triangles
a^2 + b^2 = c^2
c is the longest side
9 + 16 = 25
25 + 144 = 169

More right triangle facts
for any positive number x, there is a right triangle whose sides are 3x, 4x, and 5x
ie x=pi
3pi, 4pi, and 5pi

454590 right triangle side lengths
 sides are x, x, and x√2



Triangle inequality
The sum of the lenghts of nay two sides is _______ than the length of the third side
Greater

Equalateral triangle formula
 Area = (s^2 √3)/4

