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anonymous
 one year ago
The measure of arc AXB is 196. What is the measure of the tangentchord angle ABC?
http://media.apexlearning.com/Images/200701/18/55e3ff8521444d699c272b7789a8d76c.gif
anonymous
 one year ago
The measure of arc AXB is 196. What is the measure of the tangentchord angle ABC? http://media.apexlearning.com/Images/200701/18/55e3ff8521444d699c272b7789a8d76c.gif

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0i reaalllyyyyy need the help :) please

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0the m<ABC will be equal to the measure of the angle subtended by the chord in the opposite segment

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0dw:1434905469876:dw

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0you can use the fact that the arc AXB = 196 degrees to find the value of this angle

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0is there a formula i can plug this into?

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0I never did arcs when in college (many years ago) so i'm not sure!. Sorry you'll have to google that  or someone else probably knows

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0there's probably a theorem

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0dw:1434906010781:dw

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0the angle marked is 360  196 = 164 degrees

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0this is the angle at the center of the circle

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0then do you subtract it from 180 and with that answer divide by 2?

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0dw:1434906331031:dw

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0that angle is 82 because its 1/2 of 164

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0now opposite angles of a cyclic quadrilateral add up to 180 so the opposite angle = 180  82 = 98

Mertsj
 one year ago
Best ResponseYou've already chosen the best response.0The Theorem: An Angle formed by a chord and a tangent that intersect on a circle is half the measure of the intercepted arc. 1/2 of196=98

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0dw:1434906511832:dw

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0 which makes m<ABC = 98 degrees this might be a round about way to do it though!!

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0could you help me with another one?

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0there you go Mertsj has a quick way

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0If the measure of angle DEF is 65, what is the measure of arc DE ? http://media.apexlearning.com/Images/200701/18/df4742e6e568423ebfe061f1985506e7.gif

Mertsj
 one year ago
Best ResponseYou've already chosen the best response.0Did you read the theorem I posted above?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so do i just double 65

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0use the theorem Mertsj quoted

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0easy using that theorem

Mertsj
 one year ago
Best ResponseYou've already chosen the best response.0yep. That's what theorems are for. You prove something once and for all and then you don't have to reinvent the wheel for every similar problem.

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0true  Its weird but we never touched arc measurements in Geometry in the UK  as I said I'm talking decades ago. Maybe they do now.

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0yes  i don't understand why they didn't

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0how about another one?

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0lol  this is a learning experience for me  OK

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0In the diagram below, line AB and BC and are tangent to center O. What is the measure of arc ADC?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0http://media.apexlearning.com/Images/200701/18/ac3f47ed9e854bd0a3dc1b67c4cc90fb.gif

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0well as a full circle is 360 degrees arc ADC = 360  140

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0thank you so much seriously!

welshfella
 one year ago
Best ResponseYou've already chosen the best response.0i learned something new myself
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