# Rectangle

The rectangle is 21 cm long and 38 cm wide.

Determine the radius of the circle circumscribing rectangle.

Result

r =  22 cm

#### Solution:

$a=21 \ \text{cm} \ \\ b=38 \ \text{cm} \ \\ \ \\ u=\sqrt{ a^2+b^2 }=\sqrt{ 21^2+38^2 } \doteq \sqrt{ 1885 } \ \text{cm} \doteq 43.4166 \ \text{cm} \ \\ \ \\ D=u=43.4166 \doteq \sqrt{ 1885 } \ \text{cm} \doteq 43.4166 \ \text{cm} \ \\ \ \\ r=D/2=43.4166/2 \doteq 21.7083 \doteq 22 \ \text{cm}$ Our examples were largely sent or created by pupils and students themselves. Therefore, we would be pleased if you could send us any errors you found, spelling mistakes, or rephasing the example. Thank you!

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Showing 1 comment: Pancake
Thanks, this really helped. Ima go eat my French toast now Tips to related online calculators
Do you want to convert length units?
Pythagorean theorem is the base for the right triangle calculator.

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