# Isosceles trapezoid

Calculate the circumference and the contents of the isosceles trapezoid if you know the size of the bases is 8 and 12 cm and the size of the arms is 5 cm.

Correct result:

o =  30 cm
S =  45.826 cm2

#### Solution:

$o=8+12+2 \cdot \ 5=30 \ \text{cm}$
$S=\sqrt{ 5^{ 2 }-(4/2)^{ 2 } } \cdot \ (8+12)/2=45.826 \ \text{cm}^2$ 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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