Art of Problem Solving

2011 AMC 12A Problems/Problem 24: Difference between revisions

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== Problem ==
== Problem ==
Consider all quadrilaterals <math>ABCD</math> such that <math>AB=14</math>, <math>BC=9</math>, <math>CD=7</math>, and <math>DA=12</math>. What is the radius of the largest possible circle that fits inside or on the boundary of such a quadrilateral?
<math>
\textbf{(A)}\ \sqrt{15} \qquad
\textbf{(B)}\ \sqrt{21} \qquad
\textbf{(C)}\ 2\sqrt{6} \qquad
\textbf{(D)}\ 5 \qquad
\textbf{(E)}\ 2\sqrt{7} </math>
== Solution ==
== Solution ==
== See also ==
== See also ==
{{AMC12 box|year=2011|num-b=23|num-a=25|ab=A}}
{{AMC12 box|year=2011|num-b=23|num-a=25|ab=A}}

Revision as of 01:37, 10 February 2011

Problem

Consider all quadrilaterals $ABCD$ such that $AB=14$, $BC=9$, $CD=7$, and $DA=12$. What is the radius of the largest possible circle that fits inside or on the boundary of such a quadrilateral?

$\textbf{(A)}\ \sqrt{15} \qquad \textbf{(B)}\ \sqrt{21} \qquad \textbf{(C)}\ 2\sqrt{6} \qquad \textbf{(D)}\ 5 \qquad \textbf{(E)}\ 2\sqrt{7}$

Solution

See also

2011 AMC 12A (ProblemsAnswer KeyResources)
Preceded by
Problem 23
Followed by
Problem 25
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
All AMC 12 Problems and Solutions