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Materi : Bangun Datar
Kelas : 7
[28].
Keliling persegi panjang ;
= 2 x (p + l)
= 2 x (70 + 80)
= 2 x (150)
= 300 m^2
Jawaban : B
[29].
Luas balok ;
= 2 x (pl + pt + lt)
= 2 x (15 x 9 + 15 x 12 + 12 x 9)
= 2 x (135 + 180 + 108)
= 2 x (423)
= 846 cm^2
Jawaban : A
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