Final answer:
To get the diameter and circumference of circular objects like coins, cookies, or glasses, measure the widest part of the object to get the diameter. For the circumference, you can use the formula C=πd, where d is the diameter. Repeat the process with different objects, substituting their respective diameters in the formula.
Step-by-step explanation:
To determine the diameter and circumference of circular objects such as coins, cookies, or drinking glasses, you can use a ruler or tape measure. First, measure across the widest part of the object - this will give you the diameter.
Let's use a coin as an example. If the coin's width measures 2.2 cm, this is our diameter. The circumference of a circle is calculated using the formula C = πd, where d is the diameter. Thus, if π equals approximately 3.14159, then the circumference of the coin is approximately 6.91 cm (when rounded to the nearest tenth).
Repeat the process for other objects, substitifying the appropriate diameter of each into the formula C = πd to get the circumference. Remember to round to the nearest tenth of a unit for all measurements.
Learn more about Circle Measurements