Jawabanmu

2014-04-19T13:40:00+07:00
Cari luas persegi panjang PQRS dulu, lalu dikurang luas yg tidak diarsis.
= 15 cm x 10 cm - 67 cm persegi
= 150 cm persegi - 67 cm persegi
= 83 cm persegi
  • unie
  • Gemar Membantu
2014-04-19T13:57:33+07:00

 LPP PQRS= PxL
                     = QR x PQ
                     = 15 x 10
                     = 150 cm2
LI = LPP PQRS - LDD
     =150 - 67 = 83cm2
LP KLMN = Sisi x sisi  
                  = 20 x 20 = 400
LII = LP KLMN - LDD
      = 400 - 67 = 333
LD tdk diarsir = LI + LII
                         = 83 + 333
                         = 416

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