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Secant DB intersects secant DZ at point D. Find the length of DY

Secant DB intersects secant DZ at point D. Find the length of DY
asked 219k views
4 votes
Secant DB intersects secant DZ at point D. Find the length of DY

Secant DB intersects secant DZ at point D. Find the length of DY-example-1
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User GameAlchemist
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1 Answer

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By the Intersecting Secants Theorem we have
2x(2x+7)=x(x+23)
4x^2+14x=x^2+23x
3x^2=9x
3x=9
x=3
Since DY is length 2x,
the length of DY is 6.
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User Marc Esher
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8.6k points
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