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= 6 cm
c = 10 cm
a² + b² = c²
a² = c² - b²
a² = 10² - 6²
a² = 100 - 36
a² = 64
√a² = √64
a = 8
t trapesium = a
= 8 cm
LP = 2(La) + (Ka × t)
= 2(1/2 × (a + b) × t) + ((Jumlah seluruh sisi) × t)
= 2(1/2 × (7 + 13) × 8) + ((8 + 7 + 13 + 10) × 30)
= 2(1/2 × 20 × 8) + (38 × 30)
= 2(80) + 1140
= 160 + 1140
= 1300 cm²