Keliling ∆ sama kaki = a + s + s
32 cm = 12 cm + 2s
32 cm - 12 cm = 2s
20 cm = 2s
s = 10 cm (d)
12 + 2S = 32
2S = (32 - 12)
2S = 20
S = 20/2
S = 10/1
S = 10 (D)
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Keliling ∆ sama kaki = a + s + s
32 cm = 12 cm + 2s
32 cm - 12 cm = 2s
20 cm = 2s
s = 10 cm (d)
12 + 2S = 32
2S = (32 - 12)
2S = 20
S = 20/2
S = 10/1
S = 10 (D)