*persegi PQRS
panjang PQ = QR = RS = SP
PQ = √2² + 4²
PQ = √4 + 16
PQ = √20
luas = s x s
luas = √20 x √20
luas = 20
persegi kecil
luas = 2 x 2
luas = 4 cm²
luas daerah yg diarsir = luas persegi besar - persegi kecil
= 20 - 4
= 16 cm²
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*persegi PQRS
panjang PQ = QR = RS = SP
PQ = √2² + 4²
PQ = √4 + 16
PQ = √20
luas = s x s
luas = √20 x √20
luas = 20
persegi kecil
luas = s x s
luas = 2 x 2
luas = 4 cm²
luas daerah yg diarsir = luas persegi besar - persegi kecil
= 20 - 4
= 16 cm²