Question

laturile unui dreptunghi au lungimile de : 3 radical 40 cm si 7 radical 90 cm. calculatati perimetriul dreptunghiului​

Answer 1

$P=2L+2\ell\\P=2(7\sqrt{90}),+2(3\sqrt{40})\\P=14\sqrt{90}+6\sqrt{40}\\P=42\sqrt{10}+12\sqrt{10}\\P=54\sqrt{10}$