sisi tegak² = 13² - 12²
sisi tegak² = 169 - 144
sisi tegak² = 25
sisi tegak = √25
sisi tegak = 5 cm
V = 1/2 × a × t × tp
V = 1/2 × 5 × 12 × 15
V = 5 × 6 × 15
V = 450 cm³
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sisi tegak² = 13² - 12²
sisi tegak² = 169 - 144
sisi tegak² = 25
sisi tegak = √25
sisi tegak = 5 cm
V = 1/2 × a × t × tp
V = 1/2 × 5 × 12 × 15
V = 5 × 6 × 15
V = 450 cm³