April 2020 1 23 Report
Persamaan lingkaran yang berpusat di O(0,0) dan melalui titik A(a,b) adalah......
A. x^2 + y^2 + a^2 + b^2 = 0
B. (x+a) (x-a) + (y+b) (y-b) = 0
C. (x+a)^2 + (y+b)^2 = 0
D. (x^2-a^2) + (y^2+b^2) = 0
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