0.4mm lead surface area
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Surface area (mm^2) of a 0.4mm lead
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lead diameter (mm)0.20.350.40.50.7
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writing angle (degrees)
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200.090.280.370.571.13
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300.060.190.250.390.77
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400.050.150.200.310.60
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500.040.130.160.260.50
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600.040.110.150.230.44
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700.030.100.130.210.41
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calculate length of cylindric section
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lead diameterwriting angle
angle short side
angle long side
length long side
length of cylindric section
surface cylindric section
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0.22070200.54949548390.584760880.092
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0.23060300.34641016150.40.063
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0.24050400.23835071850.31114476540.049
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0.25040500.16781992620.26108145790.041
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0.26030600.11547005380.23094010770.036
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0.27020700.072794046850.21283555450.033
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0.352070200.96161709681.023331540.281
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0.353060300.60621778260.70.192
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0.354050400.41711375740.54450333940.150
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0.355040500.29368487090.45689255130.126
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0.356030600.20207259420.40414518840.111
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0.357020700.1273895820.37246222040.102
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0.42070201.0989909681.169521760.367
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0.43060300.6928203230.80.251
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0.44050400.4767014370.62228953070.195
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0.45040500.33563985250.52216291570.164
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0.46030600.23094010770.46188021540.145
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0.47020700.14558809370.4256711090.134
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0.52070201.373738711.46190220.574
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0.53060300.866025403810.393
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0.54050400.59587679630.77786191340.305
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0.55040500.41954981560.65270364470.256
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0.56030600.28867513460.57735026920.227
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0.57020700.18198511710.53208888620.209
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0.72070201.9232341942.046663081.125
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0.73060301.2124355651.40.770
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0.74050400.83422751481.0890066790.599
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0.75040500.58736974180.91378510250.502
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0.76030600.40414518840.80829037690.444
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0.77020700.2547791640.74492444070.410
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measured values
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0.244050400.28602086220.37337371840.070
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0.364050400.42903129330.56006057770.158
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0.464050400.54820665260.71563296040.259
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0.554050400.65546447590.85564810480.370
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0.684050400.8103924431.0578922020.565
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