anonymous
  • anonymous
The circle shown below has AB and BC as its tangents. If the measure of arc AC is 130°, what is the measure of angle ABC? 80° 65° 70° 75°
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
anonymous
  • anonymous
|dw:1335032976626:dw|
anonymous
  • anonymous
|dw:1335033326418:dw|

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More answers

anonymous
  • anonymous
Arc AC is the part of the circle connecting A and C. It lies on the circumference of the circle.
anonymous
  • anonymous
|dw:1335033299166:dw|
anonymous
  • anonymous
What does that say?
anonymous
  • anonymous
I need to know how to find the measure of abc
anonymous
  • anonymous
The angle is actually equal to the (far arch-near arc)/2. The far arc is the one farther from the angle unknown. Since near arc = 130, far arc = 230. Therefore, the unknown angle is (230-130)(1/2) = (100/2) = 50 deg.
anonymous
  • anonymous
Thats not one of the options though
anonymous
  • anonymous
@eigenschmeigen take a look at this pls.
anonymous
  • anonymous
yeah i got 50 ill show:
anonymous
  • anonymous
There is no right answer
anonymous
  • anonymous
the answer is 50
anonymous
  • anonymous
I aslo get 50 (draw line from centre to B, Pythagorus)
anonymous
  • anonymous
|dw:1335033823663:dw|
anonymous
  • anonymous
@eigenschmeigen my man! love ur answers :D
anonymous
  • anonymous
|dw:1335033908901:dw|
anonymous
  • anonymous
|dw:1335033879923:dw| break it into two triangles, and we know triangles have interior angles that add up to 180 so that quadrilateral has 360 as the sum of its interior angles so \[130 + 90 + 90 +\alpha = 360 \] so\[\alpha = 360 - 90 -90 -130 = 50\]
anonymous
  • anonymous
The only problem is fifty's not an option
anonymous
  • anonymous
aw thanks @integralsabiti :D means a lot to me
anonymous
  • anonymous
oh yeaaa :D that is the best part!
anonymous
  • anonymous
hmm 50 isnt an answer is it
anonymous
  • anonymous
No
anonymous
  • anonymous
if @eigenschmeigen says that the answer is 50 then u should make a new option :D option E.
anonymous
  • anonymous
haha
anonymous
  • anonymous
:D
anonymous
  • anonymous
i'll check through the problem see if we missed something
anonymous
  • anonymous
i cant see any errors :/
anonymous
  • anonymous
i checked it using some geometry software, its 50 for sure
anonymous
  • anonymous
Abselutely agree.
anonymous
  • anonymous
The answer was 65 degrees, @eigenschmeigen @integralsabiti
anonymous
  • anonymous
im sorry, but either the answers are wrong or have written the question wrong i say this in the nicest possible way of course :) where was this question from?
anonymous
  • anonymous
1 Attachment
anonymous
  • anonymous
A test
anonymous
  • anonymous
and you're sure its 130?
anonymous
  • anonymous
I got it right, I guessed the right answer. It was 65

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