Rectangle

The rectangle is 21 cm long and 38 cm wide.

Determine the radius of the circle circumscribing rectangle.

Correct answer:

r =  22 cm

Step-by-step explanation:

$$\begin{gathered} a=21\text{ cm } \\ b=38\text{ cm } \\ u=\sqrt{a^2+b^2}=\sqrt{21^2+38^2}=\sqrt{1885}\text{ cm}\doteq 43.4166\text{ cm } \\ D=u=43.4166=\sqrt{1885}\text{ cm}\doteq 43.4166\text{ cm } \\ r=D\mathrm{/}2=43.4166\mathrm{/}2=22\text{ cm} \end{gathered}$$

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Pancake

Thanks, this really helped. Ima go eat my French toast now

2 years ago  Like

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