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600 = (3x.4x)/2
1200 = 12x^2
100 = x^2
X = 10
600 = 1/2 x 4a x 3a
600 = 1/2 x 12a²
12a² = 600 x 2
12a² = 1200
a² = 1200/12
a² = 100
a = √100
a = 10 cm
d₁ = 4a = 4(10) = 40
d₂ = 3a = 3(10) = 30
S₁ = √20² + 15²
S₁ = √400 + 225
S₁ = √625
S₁ = 25 cm
Keliling = 4S₁
= 4(25)
= 100 cm