Luas bangun ABCD = . . . cm2
Matematika
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Pertanyaan
Luas bangun ABCD = . . . cm2
1 Jawaban
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1. Jawaban whongaliem
AB = BC = 10
AC = DC
AC² = AB² + BC²
= 10² + 10²
= 100 + 100
= 200
L.ABCD = L.ABC + L.ACD
= 1/2 x AB x BC + 1/2 x AC x CD
= 1/2 x 10 x 10 + 1/2 x AC x AC
= 5 x 10 + 1/2 x AC²
= 50 + 1/2 x 200
= 50 + 100
= 150 cm²