Jika panjang AF=10 cm ,CG = 4 cm,EH=15 cm,dan BD = 8 cm,maka luas daerah arsiran ABCDE = . . . . A. 54 C. 72 B. 78 D. 68
Matematika
mariamusi
Pertanyaan
Jika panjang AF=10 cm ,CG = 4 cm,EH=15 cm,dan BD = 8 cm,maka luas daerah arsiran ABCDE = . . . .
A. 54 C. 72
B. 78 D. 68
A. 54 C. 72
B. 78 D. 68
1 Jawaban
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1. Jawaban incess25
Labd = ½.8.10 = 40cm²
Lbcd = ½.4.8 = 16 cm²
Lbed = ½.15.8 = 60 cm²
luas diarsir = Labc + Lcde
Labc =Labd - Lbcd = 40 - 16 = 24 cm²
Lcde = Lbed - Lbcd = 60 - 16 = 44 cm²
luas diarsir = 24 + 44 = 68 cm2