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TP² = 72
TP = √72
PA² = 3² + 6²
PA² = 45
PA = √45
TA² =( √72 )²+ (√45)²
TA² = 72 + 45
TA² = 117
TA = √117
l segitiga = l segitiga
1/2 ( √72 . √45) = 1/2 ( √117 x) ( x = titik p ke ta)
√72. √45 / √117 = x
x = 5,263