What’s the circumference of a circle with a diameter of 9 inches? Use 13.14 for n
2 answers:
Answer:
The circumference of the circle is 28.26 inches.
Step-by-step explanation:
If you think about it in retrospect, circles must have been hard to find the perimeter of in the old math days. They weren't straight like squares, so it must have been really hard to approximate what the perimeter would have been for a circle.
Luckily, these days, we don't have to worry about that anymore. Now we know that the perimeter of a circle, also known as the circumference, can be found with the following formula:
where is a constant;
and d is the diameter of a circle.
The diameter of a circle, in my own words, is the length of a line that intersects the center of the circle as well as two points on that circle. Half of the diameter is also known as the radius.
Luckily, for this problem, we're already given and the diameter <em>d</em>, so we just have to plug them in to find the circumference.
Therefore, without rounding, the circumference of the circle is 28.26 inches.
You might be interested in
Functions are used to represent graphs, and vice versa.
The function represented by the graph is
The graph (see attachment) is an absolute value graph.
An absolute value graph is represented as:
Where
The vertex is the minimum or the maximum point on the graph.
So, we have:
The function becomes
The function also passes through the point (-1,0).
So, we have:
Remove the absolute bracket
Subtract 3 from both sides
Divide both sides by 3
Substitute -1 for (a) in
Hence, the function represented by the graph is
Read more about absolute value graphs at:
