No 9 dan 10 tolong jawab(pake cara)
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t = 30
a= 2
x = a/p ( 2l - t)
x = 2/20 ( 2x.30 - 20)
x = 1/10 (60-20)
x= 1/10(40)
x = 4 cm
10
y² = 4 (4+6)
y² = 4(10)
y = √40