Question

Tolong pake caranya ya

Answer 1

7. panjang sisi alas= (1/2 x 18) + (1/2 x 24)= 9 + 12 (dikuadratkan) = 81 + 144 = 225 = 15 cm
maka L.permukaan prisma,
(2 x L.alas) + (Kel.alas x t)= (2 x 1/2 x 18 x 24) + (4 x 15 x 15 )= 432 + 900=1.332 cm2

V.prisma= L.alas x t = 1/2 x 18 x 24) x 15= 216 x 15 =3.240 cm3

8. panjang sisi alas
K=4 x s
40= 4 x s
S= 40/4= 10 cm

panjang diagonal,
10 - (1/2 x 12)=10-6 (dikuadratkan)= 100 - 36 = 64 = 8 cm x 2 = 16 cm

L.permukaan = (2 x L.alas) + (kel.alas x t) =( 2 x 1/2 x 12 x 16) + (4 x 10 x 15)= 192 + 600 = 792 cm2

V.prisma = L.alas x t = (1/2 x 12 x 16) x 15 = 96 x 15 = 1.440 cm3

10. sisi miring segitiga
24 + 7 (dikuadratkan) = 576 + 49 = 625 = 25 cm

L.permukaan,
(2 x L.alas) + ( kel.alas x t)= (2 x 1/2 x 24 x 7) + (24+7+25 x 20) = 168 + 1.120 = 1.288 cm2

V.prisma,
L.alas x t = (1/2 x 24 x 7) x 20= 84 x 20 = 1.680 cm3

11. L.permukaan,
(2 x 1/2 x 10 + 13 x 3) + (2 x 10 x 25) + (25 x 5) + (25 x 13) = 69 + 500 + 125 + 325 = 1.019 dm2

V.= L.alas x t = (1/2 x (10 + 13) x 3) x 25 = 34,5 x 25 = 862,4 dm3

semoga membantu....