Solution:
Given that,
A circle with radius 17 mm
To find: circumference of circle
The circumference of circle is given as:
[tex]C = 2 \pi r[/tex]
Where, "r" is the radius of circle
Substitute r = 17 mm
[tex]C = 2 \times \pi \times 17\\\\C = 34\ \pi\\\\C = 34 \times 3.14\\\\C = 106.76[/tex]
Thus the exact circumference of a circle with a radius of 17 mm is [tex]34 \pi[/tex] or 106.76 mm