ICSE Class X Math 2013 Solved Paper

$A B$ is a diameter of a circle with centre $C=$ $(-2,5)$ . If $A=(3,-7)$ . Find:

Question : 10 of 46

Marks: +1, -0

The length of radius

A C

Solution:

The length of radius

A C

\;={√{(-2-3)^2+(5+7)^2}}

\;={√{(-5)^2+(12)^2}}

\;={√{25+144}}

\;={√{169}}

\;=13 .

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