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= 17,5 cm
b. keliling = 8 cm + 16 cm + 12 cm
= 36 cm
c. keliling = 25 cm + 35 cm + 20 cm
= 80 cm
keliling segitiga
= s+s+s
=4,5+7,5+5,5 cm
=17,5 cm
b.
keliling segitiga
=8+16+12 cm
=36 cm
c.
keliling segitiga
=s + s + s
= 25 + 35+20 cm
= 80 cn