Its 2.25 just took test 100%
The answer is (A), (B) and (E).
Step-by-step explanation: The given equation of the circle is
which is the standard form of the circle.
So, centre of the circle is (1, 0) and radius is 3 units.
Therefore, the centre lies on the X-axis.
Also, the radius of the circle is 3 units, which is same as the radius of our original circle.
Thus, options (A), (B) and (E) are correct.
The statements 1 and 4 are true.
In order to quickly visualize the center and radius of the circle we can manipulate the given equation in such a way that it changes to the standard form.
Now that the equation is its standard form we can compare it to the standard form formula to determine the center and radius of the circle:
Where are the coordinates of the center of the circle and is the radius of the circle. Therefore the circle we were given has center in (1,0) and radius . With this in mind we can analyze each statement.
1. The radius of the circle is 3 units. This statement is correct.
2. The center of the circle lies on the y-axis. This statement is false, since the center of the circle has the coordinates (1,0) it means that it actually lies in the x-axis.
3. The standard form of the equation is (x - 1)² + y² = 3. This is false the correct standard equation is (x - 1)² + y² = 9.
4. The radius of the circle is the same as the radius of the circle who's equation is x² + y² = 9. This statement is correct, the radius is given by the square root of the constant on the right side of the equation, therefore the radius of both circle is 3.
ARC BC: 108
ARD ED: 68
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