Mathematics
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OpenStudy (anonymous):
Which is a secant of circle P?
Question 2 options:
line m
line n
segment PQ
segment QR
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OpenStudy (anonymous):
@jim_thompson5910
jimthompson5910 (jim_thompson5910):
a secant is a line that cuts through the circle at 2 points
this line goes off forever in both directions
OpenStudy (anonymous):
Is it line n?
OpenStudy (anonymous):
@jim_thompson5910
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jimthompson5910 (jim_thompson5910):
does line n cut through the circle at 2 points?
2 different points
OpenStudy (anonymous):
No none of them does
OpenStudy (anonymous):
I am so unsure about this question :(
jimthompson5910 (jim_thompson5910):
yes one line crosses through the circle at 2 points
jimthompson5910 (jim_thompson5910):
you're not looking hard enough
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OpenStudy (anonymous):
omg line m
jimthompson5910 (jim_thompson5910):
yes
OpenStudy (anonymous):
is a tangent line m also ?
jimthompson5910 (jim_thompson5910):
no, a tangent only touches at 1 spot
OpenStudy (anonymous):
line n?
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jimthompson5910 (jim_thompson5910):
yes
OpenStudy (anonymous):
okay so a chord and a tangent is the same ?
jimthompson5910 (jim_thompson5910):
no
jimthompson5910 (jim_thompson5910):
a chord is basically a secant BUT it is a segment with its endpoints on the circle
OpenStudy (anonymous):
segment QR?
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jimthompson5910 (jim_thompson5910):
|dw:1417918358763:dw|
jimthompson5910 (jim_thompson5910):
yeah QR is a chord
jimthompson5910 (jim_thompson5910):
since QR is a chord AND it goes through the center P, QR is also a diameter
jimthompson5910 (jim_thompson5910):
|dw:1417918443512:dw|
Note: you can also have a tangent segment in addition with a tangent line