Jika AB = 15 m, DB= 7cm , dan AD= 20cm, hitunglah;

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a. Keliling ABCD
b. Luas ABCD
tolong bantu

Jika AB = 15 m, DB= 7cm , dan AD= 20cm, hitunglah;

A.15+7+20+15+7+20=84
B.15+7+20=42

A. =2(15+7+20)
= 2(42) = 84

b. = 15×7×20
= 1.200