2. a. ac= akar bc^2 - ab^2 = akar 10^2 - 8^2 = akar 100-64= akar 36 = 6 cm. b. sebangun. 3. a. kn=lm=4 cm, dan mn=kl=6 cm. b. st= rs×lm/kl = 15×4/6 = 60/6 = 6 cm. tu=rs= 15 cm, dan ru=st=6 cm. 4. a. bc=cf=6 cm. b. ef = bc×bc/dc = 6×6/3 = 36/3 = 12 cm. 5. a. sebangun. b.kongruen. 6. a. x=8×3/6=24/6=4 cm. b. x=14×5/8=70/8=8,5 cm.
=1:1.500.000×27= 40.500.000cm:100.000= 405 km
2 skala=jrak sbnarnya : jrak pda peta
=360km:72cm= 36.000.000:72=1:500.000
3 jrak pda peta=jrak sbnarnya:skala
=20km:50.000cm
= 2.000.000:50.000=4cm
klo gak slh itu jga
b. sebangun.
3. a. kn=lm=4 cm, dan mn=kl=6 cm.
b. st= rs×lm/kl = 15×4/6 = 60/6 = 6 cm. tu=rs= 15 cm, dan ru=st=6 cm.
4. a. bc=cf=6 cm.
b. ef = bc×bc/dc = 6×6/3 = 36/3 = 12 cm.
5. a. sebangun.
b.kongruen.
6. a. x=8×3/6=24/6=4 cm.
b. x=14×5/8=70/8=8,5 cm.
jawaban:
2. a) 3,5x10^9
b) 2,56x10^-6
c) 3x10^8
3. a) 6,25x10^6x10^-4
=6,25x10^6-4
=6,25x10^2
b) 2,7x4x10^5-2
=10,8x10^3
=1,08x10^4
c) 6x5x10^-3+-5
=30x10^-8
=3x10^-7
4. a) 1,75/5x10^12-6
=0,35x10^6
=3,5x10^5
b) 1,6/4x10^-4+-4
=0,4x10^8
=4x10^7
5. a) 2,89x10^8
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