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JADI KITA PAKEK TRIPEL pytagoras aja
karna sisi miring (EF) = 20
jadi kita pakek tripel = 12, 16, 20
karna FK lebih panjang dari EK & 20 itu miliknya EF
Jadi panjang EK = 12
FK = 16 (A)
itu cara nalarnya, kalau pakek rumus aku kurang tau :)
Luas1 = Alas x tinggi
= EF x GJ
= 20 x 12 = 240 cm²
Luas2 = EH x FK
= 15 x FK
Luas2 = Luas 1
15 FK = 240cm²
FK = 240 /15 = 16cm