17. Perhatikan gambar berikut! 15 cm 20cm dan 30 cm Luas permukaan bangun tersebut adalah....
" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
Lp1=
[tex]6 \times {s }^{2} [/tex]
= 6×15×15
=6×225
[tex] {1.350}cm^{2} [/tex]
=1.350-(s×s)
=1.350-(15×15)
1.350-225
=
[tex] {1.125}cm^{2} [/tex]
Lp2= 2×(p×l+p×t+l×t)
= 2×(30×15+30×20+15×20)
= 2×(450+600+300)
= 2×1.350
= 2.700cm2-(s×s)
=2.700-(15×15)
=2.700-225
=2.475cm2
=1.125+2.475=3.600cm2