milimeters
9 cm
It's Yard
what is the best estimate of the capacity of a soda can
The best estimate is the true value.
Since sqrt(52) is an irrational number, the best estimate is √52. Any decimal estimate can be improved by adding another digit so none can be BEST.
The best estimate for the circumference of a circle that has a diameter of 6 is 18.9
9 cm
20 inch
It's Yard
in miles
Inches or centimeters.
The circumference of a circle that has a diameter of 6.75 feet is about 21.2 feet.
The thickness of any U.S. coin is measured at the rim. For dimes it's 1.35mm.
cm
You have to calculate the radius - half the diameter. Then square the radius, and multiply by pi (approximately 3.1416). If you want to do a mental estimate, round pi to 3.
230 miles
You'd measure the length of a car in metres.