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a=
a=
a=( (5÷2)×5 ) -5
a= (2,5×5) - 5
a= 12,5 - 5
a=7,5cm
b=
b=(11,25÷5) ×2
b= 2,25×2
b= 4,5cm
c. a²=2×8
a²=16
a=
a= 4cm
b²=2×(2+8)
b²=2×10
b²=20
b=
c²=8×(8+2)
c²=8×10
c²=80
c=
maaf kalo ada yang salah
aku pake rumus pada gambar