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**CHECK PLZ HELP a little**

Determine the equation of the following locus.

1)-Locus of points that are 10 units from the origin.

x^2+y^2=100?

2-The points 3 units from the circumference of the circle with centre (0, 0) and radius 5 units

What does the 3 units from the circumference mean? is the equation x^2+y^2=25?

Are these two correct Im not sure about the second one?

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