whongaliem4) a . L ΔPQS = x alas x tinggi = x QS x PS = x 18 x 9 = 81 cm² b. L Δ SQR = x QS x RT = x 18 x 6 = 54 cm² c. L.PQRS = L.ΔPQS + L.ΔSQR = 81 + 54 = 135 cm² 5) L.PQRS = L.Pp - 2 x L.Δk - 2 x L Δb = 20 x 25 - 2 x .5 . 5 - 2 x . 15 . 20 = 500 - 25 - 300 = 175 m² biaya = 175 x Rp 20.000 = R p 3.500.000
= x QS x PS
= x 18 x 9
= 81 cm²
b. L Δ SQR = x QS x RT
= x 18 x 6
= 54 cm²
c. L.PQRS = L.ΔPQS + L.ΔSQR
= 81 + 54
= 135 cm²
5) L.PQRS = L.Pp - 2 x L.Δk - 2 x L Δb
= 20 x 25 - 2 x .5 . 5 - 2 x . 15 . 20
= 500 - 25 - 300
= 175 m²
biaya = 175 x Rp 20.000
= R p 3.500.000