area=pi r squared
the r is the radius which is half of the diameter
so area =pi mulitplied by 45 squared
which is 6361.725124mm
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The area of a circle whose diameter is 6 mm is: 28.27 mm2
A circle with a radius of 50 mm has an area of 7853.98 square mm
Area in square mm = pi*1252
Diameter of circle: 70/pi = 22.28 mm rounded to two decimal places
Oh, dude, you just gotta divide the diameter by 2 to get the radius, which is 120 mm. Then you square that bad boy to get 14,400 mm². So, like, the area of the circle is 14,400 mm². Easy peasy, lemon squeezy.