Luas sebuah belah ketupat 162 cm perbandingan diagonalnya 9:4?
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L = 162 cm^2..........seperti inikah ??
....L = d1 × d2 / 2
162 = 9x × 4x / 2
162 = 18x^2
.x^2 = 9
....x = 3
Jadi
d1 = 9x = 9 (3) = 27 cm
d2 = 4x = 4 (3) = 12 cm