tolongin pake cara yg lengkap

L₁ = 10 x 9  ====>  LM = PQ
    = 90 cm²

L₂ = 16 x 9
    = 144 cm²

L₃ = 8 x 9  ====> LM = KN
     = 72 cm²

L₄ = L₅ = 2 x  ( 16  + 10 ) x 8 : 2
            = 2 x 26 x 8 : 2
            = 26 x 8
            = 208 cm²

L₆ = PL x LM = √8² + (16 - 10)² x 9
                      = √64 + 6² x 9
                      = 64 + 36 x 9
                      = √100 x 9
                      = 10 x 9
                      = 90 cm²

Luas permukaan = L₁ + L₂ + L₃ + L₄ + L₅ + L₆
                            = 90 + 144 + 72 + (208) + 90
                            = 604 cm²

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