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=√25+144
=√169
=13 cm
L sisi tegak limas=4×LΔ
=4×1/2×a×t
=4×1/2×10×13
=260 cm²
100
tinggi sisi tegak=√12²+5²
√144+25
√169
13
jumlah luas sisi tegak=4×½×a×t
2.10.13
260