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45-45-90 Triangle (idea)
See all of 45-45-90 Triangle
, no other writeups in this node.
(
idea
)
by
DrSeudo
Sun Jun 10 2001 at 19:31:07
The name given to a
right
isosceles
triangle
. So called because its angles measure 45°, 45°, and 90°. Notable because if one leg measures
x
, then the
hypotenuse
measures sqrt(2)
x
. Proof:
a²+b² = c²
x
²+
x
² = c²
2
x
² = c²
c = sqrt(2
x
²)
c = sqrt(2)
x
.
Q.E.D.
Mnemonics for e
Q.E.D.
eternal triangle
Isosceles Triangle
Hypotenuse
geometry
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