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Chapter 1: Q 5. (page 50)

True or False

The radius of the circle x2+y2=9 is 3.

Short Answer

Expert verified

True

Step by step solution

01

Step 1. Given information

An equation of a circle isx2+y2=9.

02

Step 2. State whether the statement is true or false.

In the equation of a circle x2+y2=r2

whose center is at the origin, rrepresents the radius.

Thus, in the equation x2+y2=9

r2=9r=卤3

The radius is 3, since distance cannot be negative.

So, the given statement is true.

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