Penjelasan dengan langkah-langkah:
Mencari nilai x
K = a + b + c
36 = 2x + 2x + 3 + x + 3
36 = 5x + 6
36-6 = 5x
30 = 5x
30/5 = x
6 = x
Alas = 2x = 2(6) = 12 cm
Tinggi = x + 3 = 6 + 3 = 9 cm
Luas = ½ × alas × tinggi
Luas = ½ × 12 × 9
Luas = 54 cm²
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Penjelasan dengan langkah-langkah:
Mencari nilai x
K = a + b + c
36 = 2x + 2x + 3 + x + 3
36 = 5x + 6
36-6 = 5x
30 = 5x
30/5 = x
6 = x
Alas = 2x = 2(6) = 12 cm
Tinggi = x + 3 = 6 + 3 = 9 cm
Luas = ½ × alas × tinggi
Luas = ½ × 12 × 9
Luas = 54 cm²