Jawab yg benar yaaa pleaseee

0,5 m = 0,5 x 100 = 50 cm

= luas persegi besar - luas persegi kecil
= (50cm x 50cm)- [(50cm-10cm)x(50cm-10cm)]
=2500-(40cm x 40cm)
=2500-1600=900 cm²

LSeluruh = 50 cm x 50 cm = 2500 cm²
Ltengah = 40 cm x 40 cm = 1600 cm²

LS - LT = 2500 cm² - 1600 cm² = 900 cm²