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keliling layang2 =s4
16+16+30+30=92
L lantai = pXl
= 3,2 X 2,8
= 8,96 m²
L keramik = 40 cm X 40 cm
= 0,4 m X 0,4 m
= 0,16 m²
Banyak keramik yng ibutuhkan
= L lantai : L keramik
= 8,96 : 0,16
= 896 : 16
= 56 buah
7.
AD = √AT² + DT²
= (32:2)² + 12²
= √16² + 12²
= √256 + 144
= √400
= 20
AB = AT² + BT²
= √16²+30²
= √256+900
= √1156
= 34
K = AD+CD+AB+BC
= 2(AD) + 2(AB)
= 2(20) + 2(34)
= 40 + 68
= 108 cm
Maaf, kalau ada yang salah.