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Untuk cari lebarnya kita gunakan rumus phytagoras yaitu : a^2 + b^2 = c^2
= 8^2 + 6^2 = c^2
= 64 + 36
= 100
Akar pangkat dua dari 100 = 10 cm
Lebar = 10 cm
Luas = 15 X 10
= 150 cm 2 ( c )
Semoga membantu...
alas=15cm
tinggi=6cm
15×6=90cm²