Panjang EF adalah.... A. 8,4 cm B. 9,8 cm C. 10,5 cm D. 12,0 cm
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Jawaban:
B. 9,8 cm
Penjelasan dengan langkah-langkah:
EF = DE x AB + AE x DC
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DE + AE
= 4 x 17 + 6 x 5
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4 + 6
= 68 + 30
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10
= 98/10
= 9,8 cm