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√36+64
√100
10
Keliling ABCD
7 + 10 + 19 + 10
46 cm
19 - 7 = 12 : 2 = 6
6 kuadrat = 36
64 + 36 = 100
Akar dari 100 = 10
Jadi panjang sisi miringnya = 10 cm
Keliling = 19 + 7 + 10 + 10 = 46 cm (B)