The circumference of the circle will be 27.34 cm.
Given Diameter of the glass lens is 8.7 cm.
<h3 /><h3>What is the circumference of the circle?</h3>
Given Diameter of the glass lens D = 8.7 cm
The circumference of circle is given by = πD
where , π = constant
D= Diameter
putting the value of D in the above formula of circumference
The circumference of circle is given by = πD
The circumference of circle is given by = π 
The circumference of circle is given by = 27.37 cm (π=3.14)
Hence the circumference of the circle will be 27.34 cm.
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