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Triangle Area and Angles
The three edges
a, b, c
of the triangle :
Area of the triangle :
=
cos A =
cos B =
cos C =
Angles A
B
C
(en degrés)
The area of the triangle ABC is 1/4
sqrt((a+b+c)(-a+b+c)(a-b+c)(a+b-c))
or (Heron's formula)
sqrt(p (p-a) (p-b) (p-c))
where
p
is the 1/2 perimeter.
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Home
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Memo
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Arithmetic
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Jean-Paul Davalan
© 2002 2003
