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(3). Luas trapesium
= a×t
= 40 cm × 15 cm
= 600 cm²
Luas segitiga
= 1/2×a×t
= 1/2×40 cm × 10 cm
= 1/2×400 cm2
= 200 cm²
600+200=800 cm²
Semoga bermanfaat dan selamat Mencoba