Calculated Industries 4045-B - Manuel (Page 48)

48 — C ONSTRUCTION M ASTER ® IV
Formules de calcul d’aire
ANNEXE B
a
a
Carré
Aire = a 2
w
l
Rectangle
Aire = lw
a
b
Triangle
Aire = ab
Cercle
Circonférence = 2 π r
Aire = π r 2
r
1
2
Ellipse
Aire = π ab
b a
4045UG-F-B 6/27/03 3:37 PM Page 48