Jawaban:
1) Persegi panjang
L = p x l
L = 8 x 7
L = 56 cm²
Segitiga
L = ½ x alas x tinggi
L = ½ x ( 12 - 8 ) x 7
L = ½ x 4 x 7
L = 2 x 7
L = 14 cm²
Luas gabungannya 56 + 14 = 70 cm²
2) Persegi panjang
L = ( 2 + 2) x 3
L = 4 x 3
L = 12 m²
L = ½ x ( 2 + 2 ) x 3
L = ½ x 4 x 3
L = 2 x 3
L = 6 m²
Luas gabungannya 12 + 6 = 18 cm²
Semoga membantu dan tidak keliru
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Jawaban:
1) Persegi panjang
L = p x l
L = 8 x 7
L = 56 cm²
Segitiga
L = ½ x alas x tinggi
L = ½ x ( 12 - 8 ) x 7
L = ½ x 4 x 7
L = 2 x 7
L = 14 cm²
Luas gabungannya 56 + 14 = 70 cm²
2) Persegi panjang
L = p x l
L = ( 2 + 2) x 3
L = 4 x 3
L = 12 m²
Segitiga
L = ½ x alas x tinggi
L = ½ x ( 2 + 2 ) x 3
L = ½ x 4 x 3
L = 2 x 3
L = 6 m²
Luas gabungannya 12 + 6 = 18 cm²
Semoga membantu dan tidak keliru