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2009-12-08T17:55:31+01:00
P= πr² r=6∫2
P=π(6∫2)²
P=π 72
Ob= 2πr
Ob=2 6∫2 π
Ob=12∫2 π
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2009-12-08T17:55:32+01:00
1. d=6 r=d/2=3 P=πr²=π*3²=9π l=2πr l=2π*3=6π
2. d=1 r=0,5 P=πr²=0,25π l=2π*0,5=π
3.d=√2 r=√2/2 P=π*(2√2)²=8π l=2π*√2/2
4. d=π r=π/2 P=π*(π/2)²=π³/4 l=2π*π/2
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