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= (64 - 8 - 26)/2
= 15 cm
(26 - 8)/2 = 9 cm
Tinggi:
= √15² - 9²
= 12 cm
L = 1/2 × (Jumlah sisi sejajar) × tinggi
= 1/2 × (26 + 8) × 12
= 204 cm² (A)