Question

aflatiperimetrulsi aria patratului cu diagonalele de a)12√2 b)18cm c)a√2cm d)xcm

Answer 1

a)$A= l^{2} =(12 \sqrt{2} ) ^{2} =12 ^{2} *2=144*2=288cm ^{2}$
$P=4L=4* 12 \sqrt{2} =48 \sqrt{2}$

b)$A= l^{2} =(18 ) ^{2} =18 ^{2} =324cm ^{2}$
$P=4L=4* 18 =72cm$

c)$A= l^{2} =(a \sqrt{2} ) ^{2} =2a ^{2} cm ^{2}$
$P=4L=4* a \sqrt{2} =4a\sqrt{2}$

d)$A= l^{2} =(x ) ^{2} =x ^{2}$
$P=4L=4* x =4xcm$