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Verified answer
1. a = 45cmt = 30cm
luas segitiga = ½×a×t
½×45×30 = 675cm²
2. a = 240cm
t = 180cm
luas segitiga = ½×a×t
½×240×180 = 21600cm²
3. a = 95cm
t = 80
luas segitiga = ½×a×t
½×95×80 = 3800cm²
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