Symmetrical functions can be about the x and y axis. Essentially, if we reflect the graph across the y or x axis, we get the same graph. Some other graphs can be reflected across both the x and y axis at the same time and be symmetrical. These can be classified as odd and even functions. You can test this by replacing x and y with -x and -y and simplify the equation. If the results comes out to be the same as the original, it is symmetrical across the origin.
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To have a different rectangle with the same perimeter you just have different measurements. If you need an example let me know!
The answer to the question
Answer:
Circumference of circle =2πr=2π×10.5=21πm
Step-by-step explanation: