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OSN SMA 2017 No 1

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Melalui titik sudut $A$ dari jajargenjang $ABCD$, dibuat suatu garis $g$. Buktikan bahwa jarak dari $C$ ke garis $g$ adalah jumlah atau selisih jarak dari $B$ dan $D$ ke $g$.

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Hint 1:

Spoiler

Definisikan K perpotongan G dengan CD.

 

Hint 2:

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KQC dan KRD sebangun.

 

Hint 3:

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Hati-hati kasus letak titik K.

 

Solusi:

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Bisa diunduh di osn2017h1.pdf

 

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