ABCD adalah belah ketupat. Jika diketahui kelilingnya 40 cm dan panjang CE=8 cm. Berapa luas belah ketupat ABCD
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Materi : Bangun Datar
Sisi Belah Ketupat
4s = K
4s = 40 cm
s = 10 cm
Cari Panjang BE
BE² = BC² - CE²
BE² = 10² - 8²
BE² = 100 - 64
BE² = 36
BE = 6 cm
Cari Diagonal
L = alas × tinggi
L = AB × CE
L = 10 cm × 8 cm
L = 80 cm²
Semoga bisa membantu
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