luas segitiga=
a × t × 1/2=120
12x × 5x = 240
60x kuadrat= 640
x kuadrat=240/60
x kuadrat=4
x=2
a=12x=12 ×2=24 cm
t= 5x= 5 × 2=10 cm
sisi miring= 9x + 8= 9×2+8=26 cm
keliling= a+t+sisi miring
= 24+10+26= 60 cm
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luas segitiga=
a × t × 1/2=120
12x × 5x = 240
60x kuadrat= 640
x kuadrat=240/60
x kuadrat=4
x=2
a=12x=12 ×2=24 cm
t= 5x= 5 × 2=10 cm
sisi miring= 9x + 8= 9×2+8=26 cm
keliling= a+t+sisi miring
= 24+10+26= 60 cm