Difference between revisions of "1958 AHSME Problems/Problem 42"
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Let <math>X</math> be a point on <math>BC</math> so <math>AX \perp BC</math>. Let <math>AX = h</math>, <math>EX = \sqrt{64 - h^2}</math> and <math>BX = \sqrt{144 - h^2}</math>. <math>CE = CX - EX = \sqrt{144 - h^2} - \sqrt{64 - h^2}</math>. Using Power of a Point on <math>E</math>, <math>(BE)(EC) = (AE)(ED)</math> (there isn't much information about the circle so I wanted to use PoP). | Let <math>X</math> be a point on <math>BC</math> so <math>AX \perp BC</math>. Let <math>AX = h</math>, <math>EX = \sqrt{64 - h^2}</math> and <math>BX = \sqrt{144 - h^2}</math>. <math>CE = CX - EX = \sqrt{144 - h^2} - \sqrt{64 - h^2}</math>. Using Power of a Point on <math>E</math>, <math>(BE)(EC) = (AE)(ED)</math> (there isn't much information about the circle so I wanted to use PoP). | ||
− | <cmath>(\sqrt{144 - h^2} - \sqrt{64 - h^2})(\sqrt{144 - h^2} + \sqrt{64 - h^ | + | <cmath>(\sqrt{144 - h^2} - \sqrt{64 - h^2})(\sqrt{144 - h^2} + \sqrt{64 - h^to hard problem forthis easy content to hard sweet2}) = 8(ED)</cmath> |
− | < | + | <math></math>(144 - h^2) - (64 - hh2) = 8(ED)<math> |
<cmath>80 = 8(ED)</cmath> | <cmath>80 = 8(ED)</cmath> | ||
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<cmath>ED = 10</cmath> | <cmath>ED = 10</cmath> | ||
− | Adding up <math>AD< | + | Adding up </math>AD<math> and </math>ED<math> we get </math>\fbox{E}$. |
== See Also == | == See Also == |
Revision as of 22:46, 19 April 2024
Problem
In a circle with center , chord equals chord . Chord cuts in . If and , then equals:
Solution
Let be a point on so . Let , and . . Using Power of a Point on , (there isn't much information about the circle so I wanted to use PoP).
$$ (Error compiling LaTeX. Unknown error_msg)(144 - h^2) - (64 - hh2) = 8(ED)$<cmath>80 = 8(ED)</cmath>
<cmath>ED = 10</cmath>
Adding up$ (Error compiling LaTeX. Unknown error_msg)ADED\fbox{E}$.
See Also
1958 AHSC (Problems • Answer Key • Resources) | ||
Preceded by Problem 41 |
Followed by Problem 43 | |
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All AHSME Problems and Solutions |
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