Lp=Lalas+Lselimut
=100+4*1/2*10*13
=100+260
=360 cm²
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Lp=Lalas+Lselimut
=100+4*1/2*10*13
=100+260
=360 cm²
garis pelukis2 = (1/2rusuk)² + tinggi2
= 5² + 12²
= √25+144 = 13
luas sisi tegak = 1/2 s . p
= 1/2 13 . 10 = 65
luas permukaan = luas alas + 4(luas sisi tegak)
= 100 + 4(65)
= 100 + 260 = 360²