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maka
L = 1/2 x d1 x d2 = 243
1/2 x 2a x 3a = 243
3a² = 243
a² = 243/3
a² = 81
a = √81
a = 9
maka d1 = 2a = 2x9 = 18 cm
d2 = 3a = 3x9 = 27 cm
maka:
L = 1/2.d1.d2
243 = 1/2.2n.3n
243.2 = 6n²
486 = 6n²
n² = 486:6
n² = 81
n = √81
n = 9
jadi, d1 = 2n = 2.9 = 18 cm
d2 = 3n = 3.9 = 27 cm