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KL : 15 = 3 : 4
4 . KL = 15 . 3
4KL = 45
KL = 45 : 4
KL = 11,25 cm (tidak ada solusi)
2) (s.miring)² = (ss1)² + (ss2)²
29² = 21² + (ss2)²
841 = 441 + (ss2)²
(ss2)² = 841 - 441
(ss2)² = 400
ss2 = √400
ss2 = 20 cm
3) (d.ruang)² = p² + l² + t²
11² = (7,5)² + (5,5)² + t²
121 = 56,25 + 30,25 + t²
t² = 121 - 56,25 - 30,25
t² = 34,5
t =