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√(P²+L²+T²) = Diagonal Ruang
√(4a)²+(2a)²+(3a)² = √261
16a² +4a²+9a² = √261²
29a² = 261
a² = 261/29 =9
a= √9 = 3
Panjang = 4a = 4(3)=12cm
Lebar = 2a=2(3) =6cm
Tinggi = 3a=3(3) =9cm
p = 4x
l = 3x
t = 2x
a = l
= 3x
b = p
= 4x
a² + b² = c²
(3x)² + (4x)² = x²
9x² + 16x² = c²
25x² = c²
√25x² = √c²
5x = c
a = t
= 2x
b = c
= 5x
a² + b² = c²
(2x)² + (5x)² = 261
4x² + 25x² = 261
29x² = 261
x² = 9
√x² = √9
x = 3
p = 4x
= 4(3)
= 12 cm
l = 3x
= 3(3)
= 9 cm
t = 2x
= 2(3)
= 6 cm