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Arc AC is the part of the circle connecting A and C. It lies on the circumference of the circle.
What does that say?
I need to know how to find the measure of abc
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.
Thats not one of the options though
@eigenschmeigen take a look at this pls.
yeah i got 50 ill show:
There is no right answer
the answer is 50
I aslo get 50 (draw line from centre to B, Pythagorus)
@eigenschmeigen my man! love ur answers :D
|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\[\alpha = 360 - 90 -90 -130 = 50\]
The only problem is fifty's not an option
aw thanks @integralsabiti :D means a lot to me
oh yeaaa :D that is the best part!
hmm 50 isnt an answer is it
if @eigenschmeigen says that the answer is 50 then u should make a new option :D option E.
i'll check through the problem see if we missed something
i cant see any errors :/
i checked it using some geometry software, its 50 for sure
The answer was 65 degrees, @eigenschmeigen @integralsabiti
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?
and you're sure its 130?
I got it right, I guessed the right answer. It was 65