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What is the radius of a circle whose equation is (x – 7)2 + (1 - 10)2 = 4?2 units4 units8 units16 units

2 Answers

1 vote

Answer: the answer is A. 2 units.

Step-by-step explanation: it is show below.

What is the radius of a circle whose equation is (x – 7)2 + (1 - 10)2 = 4?2 units-example-1
User Egeland
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3.8k points
2 votes

In order to find the radius of this circle, we can compare this equation with the following standard equation of a circle:


(x-h)^2+(y-k)^2=r^2

Comparing the right side of each equation, we have:


\begin{gathered} r^2=4 \\ r=\sqrt[]{4} \\ r=2 \end{gathered}

The radius is 2 units, therefore the correct option is the first one.

User Redbmk
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5.0k points