Pertanyaan :

Please ! Besok harus di kumpulin soalnya

Jawaban :

Oke gua coba bantu jawab ya.. , 1) a. 71 cm , Kel = 4.s = 4.71 = 284 , Luas = sxb2= 71.71 = 5041, b. 21 cm , Kel = 4. 21 = 84 , Luas = 21xb2 = 441, c. 10,2 , Kel = 4. 10,2 = 40,8 , Luas = (10,2)xb2= 104,04, d. 7,12 , Kel = 4. 7,12 = 28,48 , Luas = (7,12)xb2 = 50,6944 , 2) a. Luas persegi = 81, berarti panjang rusuk = 221a81= 9cm, Kel = 4.s = 4.9 = 36 , b. Kel. persegi = 4 x s, 98 = 4.s , s = 98/4 = 24,5 , Luas persegi = (24,5)xb2 = 600,25 , Semoga membantu :), ,
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1. Keliling, a. K=4.s, =4.71, =244 cm , L=s.s=71.71= 5041 cm 2, b.K=4.s=4.21=84 cm, L=s.s=21.21=441 cm2, c.K=4.s=4.10,2=40,8cm, L=s.s=10,2.10,2=104,04cm 2, d.K=4.7,12=28,48cm, L=7,12.7,12=50,6944cm2, 2. , A. L=s.s, 81=s.s, s=akar 81, s=9, K=4.s, =4.9, =36cm, B. K=4.s, 98=4.s, s= 98/4, s=24,5, L=s.s, L=24,5.24,5, =600,25 cm 2, 3. Luas rumah=300m2=3000000cm2, Luas ubin= 20.20=400cm2, Jumlah ubin yang diperlukan =3000000/400=7500buah keramik,