circle area
Area of a circle
Category = Pi • r2
Category – circular area
Pi – Kreiszahl Pi = 3,1415
r – Radius
example:
Calculate the area of a circle using the radius
r = 6 cm.
Category = Pi • r2
Category = 3,1415 • (6cm •6cm)
Category = 3,1415 • 36 cm2
Category = 113,094 cm2
circle area
Circle area formula
[math]A=frac {\pi cdot d^{2} }{4}[/math]
Category – circular area
Pi – Kreiszahl Pi = 3,1415
Glutos – diameter
example:
Calculate the area of a circle with the diameter
d = 11 cm
[math]A=frac {\pi cdot d^{2} }{4}[/math]
[math]A=frac {3,1415 \cdot 11^{2} }{4}[/math]
[math]A=frac {3,1415 \cdot 121}{4}[/math]
[math]A=frac {380,1215}{4}[/math]
[math]A=95,030375 cm^{2} [/math]