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OA = 6
CD = 17
OD = 16/2 = 8
AD² = AO²+OD²
AD² = 6²+8²
AD² = 36+64
AD = √100
AD = 10
OC² = BC²-BO²
OC² = 17² - 8²
OC² = 289 - 64
OC = √225
OC = 15
AC = AO+OC
AC = 6+15
AC = 21
K= 2(a+b) = 2(10+17)
= 2×27
=54 cm
L = d1×d2/2
=21×16/2
=336/2 = 168 cm²
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