Four plates

Four equal maximum-sized circular plates are cut from a square sheet of paper with an area of 784 cm². Calculate the circumference of each plate.

Final Answer:

o₁ =  44 cm

Step-by-step explanation:

$$\begin{gathered} S=784{\text{cm}}^2 \\ S=a^2 \\ a=\sqrt{S}=\sqrt{784}=28\text{cm} \\ a/2=d \\ r=a/4=28/4=7\text{cm} \\ {o}_1=2\pi \cdot r=2\cdot 3.1416\cdot 7=44\text{cm} \end{gathered}$$

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