eddiebob146p293ec
eddiebob146p293ec eddiebob146p293ec
  • 04-04-2018
  • Mathematics
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What is the arc length of the subtending arc for an angle of 72 degrees on a circle of radius 4?

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calculista
calculista calculista
  • 04-04-2018
we know that

[the length of a circumference]=2*pi*r
for r= 4 units
[the length of a circumference]=2*pi*4--------------> 25.12 units

if a  full circle (360°) has a length---------------------> 25.12 units
 arc for an angle of 72 °---------------------------> X
X=72*25.12/360------------> 5.024 units

the answer is 
the length of the subtending arc for an angle of 72° is 5.024 units
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