Question

Find the radius of the circle 200 mm

Answer 1

100mm or 31.83mm

Explanation:

If 200mm is the diameter then you should:

200mm/ 2

= 100mm

If 200mm is the circumference, then you should:

200mm/ 2pi

= 200mm/6.28

= 31.83mm

Answer 2

The radius of a circle is determined by definding the diameter by 2. In this case the diameter is 200 mm (r = d/2).

r = 200 / 2

r = 100mm

1mm = 10cm

Therefore the radius of the circle is 100mm or 1000cm.

Hope this helps!