Difference between revisions of "1958 AHSME Problems/Problem 48"

(Solution)
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== Solution ==
 
== Solution ==
 
<math>\fbox{}</math>
 
<math>\fbox{}</math>
wait i need to solve it first
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*If somebody wants to draw a diagram or make this solution better, PLEASE do so. I cannot express how bad I am at this.
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If P is on A, then the length is 10, eliminating answer choice (B).
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If P is equidistant from C and D, the length is 2\sqrt{1^{2}+5^{2}}=2\sqrt{26}>10, eliminating (A) and (C).
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If CDP is a right triangle, then CDP will be right or DCP will be right. Assume that DCP is right.
  
 
== See Also ==
 
== See Also ==

Revision as of 23:15, 31 December 2023

Problem

Diameter $\overline{AB}$ of a circle with center $O$ is $10$ units. $C$ is a point $4$ units from $A$, and on $\overline{AB}$. $D$ is a point $4$ units from $B$, and on $\overline{AB}$. $P$ is any point on the circle. Then the broken-line path from $C$ to $P$ to $D$:

$\textbf{(A)}\ \text{has the same length for all positions of }{P}\qquad\\  \textbf{(B)}\ \text{exceeds }{10}\text{ units for all positions of }{P}\qquad \\ \textbf{(C)}\ \text{cannot exceed }{10}\text{ units}\qquad \\ \textbf{(D)}\ \text{is shortest when }{\triangle CPD}\text{ is a right triangle}\qquad \\ \textbf{(E)}\ \text{is longest when }{P}\text{ is equidistant from }{C}\text{ and }{D}.$


Solution

$\fbox{}$

  • If somebody wants to draw a diagram or make this solution better, PLEASE do so. I cannot express how bad I am at this.

If P is on A, then the length is 10, eliminating answer choice (B). If P is equidistant from C and D, the length is 2\sqrt{1^{2}+5^{2}}=2\sqrt{26}>10, eliminating (A) and (C). If CDP is a right triangle, then CDP will be right or DCP will be right. Assume that DCP is right.

See Also

1958 AHSC (ProblemsAnswer KeyResources)
Preceded by
Problem 47
Followed by
Problem 49
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