What is the diameter of a dart board

A standard dartboard has a diameter of 18 in. What is... - Brainly.com
The meaning of the area isthe measurement ofa surface in this case a circle, which can be find by using the formula , where r is equal to the radius of the circle. In this exercise is given that thediameterofa standard cardboard is 18 inches or a radius of 9 inches and it is asked to find its area.

If the diameter of the dart board is 42 centimeters, what is... - Socratic
Explanation: The word to note here is "approximate". This implies that an accurate calculated answer with exact values is not required, but rather just a quick estimate. Thediameter is 42cm - that's close to 40cm.