Jawaban:
1/2 x jumlah sejajar x tinggi
= 1/2 x 12 + (9+12+9) x 15² - 9² = 144 akar 144 = 12
= 1/2 x 42 x 12
= 252 cm²
A
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Jawaban:
1/2 x jumlah sejajar x tinggi
= 1/2 x 12 + (9+12+9) x 15² - 9² = 144 akar 144 = 12
= 1/2 x 42 x 12
= 252 cm²
A