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tinggi sisi tegak=√5²+12²
=√25+144
=√169
=13
luas permukaan=la+luas seluruh sisi tegak
=100+4.1/2.10.13
=100+260
=360 dm²
jawabannya A.360 dm²
Insyaallah bermanfaat
= 12 dm
b = s : 2
= 10 dm : 2
= 5 dm
a² + b² = c²
12² + 5² = c²
144 + 25 = c²
169 = c²
√169 = √c²
13 = c
t sisi tegak = c
= 13 dm
LP = La + Jumlah L sisi tegak
= s² + 4(1/2 × a × t)
= 10² + 4(1/2 × 10 × 13)
= 100 + 4(65)
= 100 + 260
= 360 dm²
Jadi luas permukaan limas tersebut adalah 360 dm² (A).