Tolong jawab dua dua nya ya....plis...
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Diket : t = 10 L = 25
Jawab : L = a × t × 1/2
25 = a × 10 × 1/2
25 = 5a
a = 25/5 = 5 cm
r = ?
k =18,84
18,84 = 3,14 × 2r
18,84/3,14 = 2r
6 = 2r
r = 6/2
r = 3