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sisi = √8² + 5,5² = √64 + 30,25 = √94,25
K = sisi x 4
maaf kak saya hanya bisa luasnya saja
luas = 1/2. 8. 5,5
luas = 22 cm²
keliling = 8² + 5,5²
keliling = 64 + 30,25
keliling = √94,25
keliling = 9,7 x 4
keliling = 38,8
Semoga membantu :)