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Mathematics 22 Online
OpenStudy (anonymous):

Which is a secant of circle P? Question 2 options: line m line n segment PQ segment QR

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

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

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?

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?

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

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