



 
Hi Sierra, The perimeter (sometimes called the circumference) of a circle is $2 \times \pi \times r$ where $r$ is the radius and $\pi$ is approximately $3.1416.$ The perimeter of a quarter circle is composed of three parts, the curved part which has a length of onequarter the perimeter of the circle and two straight parts, each of length $r.$ The length of the perimeter of the quarter circle is the sum of the lengths of the three parts. Penny  


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