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Verified answer
Panjang BD = 9 cm - 4 cm= 5 cm
AD = √BD x CD
= √5 x 4
= √20 cm
Verified answer
KesebangunanCD = 4 cm
BC = 9 cm
BC = CD + DB
DB = BC - CD
DB = 9 - 4
DB = 5 cm
AD² = CD x DB
AD² = 4 x 5 = 20
AD = √20