Q. A circle in the xy-plane has the equation(x−0.8)2+(y−5.2)2=1.69. How long is the radius of the circle?
Circle Standard Form: The equation of a circle in the standard form is (x−h)2+(y−k)2=r2, where (h,k) is the center of the circle and r is the radius. In the given equation, (x−0.8)2+(y−5.2)2=1.69, we can see that it is already in standard form with h=0.8, k=5.2, and r2=1.69.
Find Radius: To find the radius r, we need to take the square root of r2. The given value for r2 is 1.69. Therefore, we calculate r as the square root of 1.69.
Calculate Radius: Calculating the square root of 1.69 gives us r=1.69. The square root of 1.69 is 1.3. So, the radius of the circle is 1.3 units.
More problems from Find the radius or diameter of a circle