pertanyaannya ada di photo

34. cari panjang PQ
      PQ = √29² - 21² = √841-441 = √400 = 20 cm
      Keliling PQR = PQ + PR + QR = 20 + 21 + 29 = 70 cm (C)

35. cari panjang PS
      PS = √15² - 7² = √225 - 49 = √176 = 4√11 cm
      PQ = PS - QS = 4√11 - 4 = 9,27 cm
      Luas segitiga = 1/2 x a x t
                            = 1/2 x 9,27 x 7
                            = 32,445 cm²