Nomor 1 :
Segitiga + Persegi + Persegi Panjang
= (½ x a x t) + (s x s) + (p x l)
= (½ x 18 x 12) + (12 x 12) + (30 x 10)
= 108 + 144 + 300
= 552 cm²
Nomor 2 :
Keliling = 225 cm
K = 3s
225 = 3s
s = 225 / 3
s = 75 cm
Semoga Membantu^_^
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Nomor 1 :
Segitiga + Persegi + Persegi Panjang
= (½ x a x t) + (s x s) + (p x l)
= (½ x 18 x 12) + (12 x 12) + (30 x 10)
= 108 + 144 + 300
= 552 cm²
Nomor 2 :
Keliling = 225 cm
K = 3s
225 = 3s
s = 225 / 3
s = 75 cm
Semoga Membantu^_^