Jawaban:
20. D
21. C
22. B
23. A
24. B
25. C
Penjelasan dengan langkah-langkah:
20. lebar=85cm
p=3xlebar
p=3x85cm=255cm
kll=2(p+l)
=2(255+85)
=2(340)
=680cm
21. <ABC+<BCA+<CAB=180°
22. <QRS+<PQR=180°
75°+<PQR=180°
<PQR=180°-75°
=105°
23. 3pasang
24. luas=2pl+2pt+2lt
=2(15x10)+2(15x12)+2(10x12)
=2x150+2x180+2x120
=300+360+240
=900cm²
25. v.tabung= L. alasxtinggi
=22/7x7x7x35
=5.390dm³
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Jawaban:
20. D
21. C
22. B
23. A
24. B
25. C
Penjelasan dengan langkah-langkah:
20. lebar=85cm
p=3xlebar
p=3x85cm=255cm
kll=2(p+l)
=2(255+85)
=2(340)
=680cm
21. <ABC+<BCA+<CAB=180°
22. <QRS+<PQR=180°
75°+<PQR=180°
<PQR=180°-75°
=105°
23. 3pasang
24. luas=2pl+2pt+2lt
=2(15x10)+2(15x12)+2(10x12)
=2x150+2x180+2x120
=300+360+240
=900cm²
25. v.tabung= L. alasxtinggi
=22/7x7x7x35
=5.390dm³