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=- 3( 1- akar 3) jwbn anda benar
10 . 72/ 108 = 10 / ×
× = 108 × 10 / 72 = 15 cm
23. k = 15 + 12 + 25× 2 + 17= 27 + 50 +17 = 94cm
= 3 ( - 1 ) (A)
10. =
72 COD = 1.080
COD =
COD = 15 cm² (B)
27. =
10 CE = 72 - 6 CE
10 CE + 6 CE = 72
16 CE = 72
CE =
CE = 4,5
AC = 12 - 4,5 = 7,5 cm (B)
28. liat gambar