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Verified answer
Kelas 8 MatematikaBab Bangun Datar
a] AE = (AB - CD)/2
AE = (11 - 3)/2
AE = 4 cm
Karena sudutnya 45°, maka terbentuk segitiga siku-siku sama kaki, sehingga AE = DE = tinggi trapesium = 4 cm
b Luas trapesium
= 1/2 . (AB + CD) . DE
= 1/2 . (11 + 3) . 4
= 14 . 2
= 28 cm²