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Mathematics 20 Online
OpenStudy (vera_ewing):

If mABC AB= 110°, calculate the mABC. http://www.aventalearning.com/courses/GEOMx-HS-A09/b/assessments/C-CirclesExam/Geometry_7_Exam_57q3.gif

OpenStudy (amistre64):

you seem to be posting content from an exam ....

OpenStudy (vera_ewing):

@amistre64 its hw. a take home test. are they considered the same on here?

OpenStudy (amistre64):

is that a tangent and a secant line?

OpenStudy (amistre64):

if so, there is a well known property for finding x

OpenStudy (vera_ewing):

yes i think so

OpenStudy (vera_ewing):

i know AB is a tangent

OpenStudy (vera_ewing):

what property?

OpenStudy (amistre64):

the arc and angle are related in a 2:1 ratio

OpenStudy (amistre64):

the arc is always twice as big as the angle, which means the angle is half as big as the arc ....

OpenStudy (vera_ewing):

ok...so would ABC be 220?

OpenStudy (amistre64):

arcAB = 110 angle x = 110/2

OpenStudy (vera_ewing):

angle x=55

OpenStudy (amistre64):

thats better

OpenStudy (vera_ewing):

oh i get it! thanks so much! lol it was much simpler than i thought :)

OpenStudy (amistre64):

it helps to know the properties :)

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