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d = diagonal
K : 10 + 10 + 10 + 10=40
2. L : a × t = 12 × 8 =96
K : 12 + 16 +12 + 16 = 56
3. L : ( ab + cd ) ÷ 2 × t = 10 + 22 ÷2 × 8= 128
K : 22 + 10 + 10 + 10 = 52