Jawab:
B. 3 cm
Penjelasan dengan langkah-langkah:
Luas diarsir = L.ABD + L.ABC - 2 x L.ABE
Luas diarsir = [tex](\frac{AB \times 12}{2} + \frac{AB \times 6}{2} ) - 2 \times \frac{AB \times 2}{2}[/tex]
[tex]21 = (\frac{x \times 12}{2} + \frac{x \times 6}{2} ) - 2 \times \frac{x \times 2}{2} \\ \\21 = (6x + 3x) - 2x\\ \\21 = 9x - 2x\\\\ 21 = 7x\\\\ x = 21 : 7\\ \\x = 3 \ cm[/tex]
Jawaban : B
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Jawab:
B. 3 cm
Penjelasan dengan langkah-langkah:
Luas diarsir = L.ABD + L.ABC - 2 x L.ABE
Luas diarsir = [tex](\frac{AB \times 12}{2} + \frac{AB \times 6}{2} ) - 2 \times \frac{AB \times 2}{2}[/tex]
[tex]21 = (\frac{x \times 12}{2} + \frac{x \times 6}{2} ) - 2 \times \frac{x \times 2}{2} \\ \\21 = (6x + 3x) - 2x\\ \\21 = 9x - 2x\\\\ 21 = 7x\\\\ x = 21 : 7\\ \\x = 3 \ cm[/tex]
Jawaban : B