In circle A shown below, Segment BD is a diameter and the measure of Arc CB is 36°: Points B, C, D lie on Circle A; line segment BD is the diameter of circle A; measure of arc CB is 36 degrees. What is the measure of ∠DBC? 36° 72° 18° 54°
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OpenStudy (thatcreepyboy):
OpenStudy (thatcreepyboy):
@jhonyy9
OpenStudy (otherworldly):
@ThatCreepyBoy u there?
OpenStudy (thatcreepyboy):
@OtherWorldly yes
OpenStudy (otherworldly):
<DBC which angles do u think can't be the answer
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OpenStudy (thatcreepyboy):
18
OpenStudy (otherworldly):
ok any other angles u think wouldn't be correct?
OpenStudy (thatcreepyboy):
uh, 54
OpenStudy (otherworldly):
ok so which one do u think it is? XD
OpenStudy (thatcreepyboy):
72 degrees :0?
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OpenStudy (otherworldly):
look at the angle it looks like it would be less that half of a 90 degree angle ( 45 degrees)
OpenStudy (thatcreepyboy):
36?
OpenStudy (otherworldly):
one second i think i did something wrong XD
OpenStudy (otherworldly):
i think u are right about the angle being 72 degrees because the angle is more than half of a 90 degree angle so....... i guess it is 72 degrees :)
OpenStudy (otherworldly):
if u think it is something else let me know and we will discuss i just think it is 72 degrees because it looks like the angle is more than 45 degrees
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OpenStudy (agent0smith):
|dw:1475534335660:dw|
OpenStudy (agent0smith):
|dw:1475534377454:dw|
OpenStudy (agent0smith):
Try solving from there
OpenStudy (thatcreepyboy):
I'm still thinking 72
OpenStudy (agent0smith):
You have an isosceles triangle in that last triangle. You have one angle, see if you can find the other two (they're equal btw)
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OpenStudy (thatcreepyboy):
36?
OpenStudy (agent0smith):
|dw:1475536855851:dw|Solve for x.
OpenStudy (thatcreepyboy):
I don't know.. >_<
OpenStudy (agent0smith):
There's three angles inside that triangle. If you add them up, what does it equal? You should know many degrees in a triangle.
OpenStudy (thatcreepyboy):
I'm still confused..
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OpenStudy (agent0smith):
Look at the triangle. See the three angles inside it? Add them up. Set equal to the number of degrees in a triangle (which you should know...).
OpenStudy (thatcreepyboy):
Ugh I'm not good at this..
OpenStudy (agent0smith):
There's 180 degrees in a triangle.
x + x + 144 = 180
OpenStudy (thatcreepyboy):
Oh I thought it was that answer for a minute.
OpenStudy (thatcreepyboy):
@agent0smith get your butt back here. What do I have to do now?
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OpenStudy (agent0smith):
What do you think you have to do... solve for x. It's simple algebra.
OpenStudy (thatcreepyboy):
I'm not that smart in math like other people .-..
OpenStudy (otherworldly):
@ThatCreepyBoy do u get it yet
OpenStudy (otherworldly):
x+x + 144 = 180 look at ur choices what angle looks like it could work for x ..........if u plug it in x + x + 144 it should equal 180 so plug in each of ur choices if u have to into x and c if it gives u 180 or not
OpenStudy (thatcreepyboy):
Oh I think i got it
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OpenStudy (thatcreepyboy):
@OtherWorldly So I do 36 + 36?
OpenStudy (otherworldly):
36 + 36 + 144 does that equal 180??????
OpenStudy (otherworldly):
@ThatCreepyBoy
OpenStudy (thatcreepyboy):
No
OpenStudy (thatcreepyboy):
It equals 216
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OpenStudy (otherworldly):
ok then to would be........?
OpenStudy (thatcreepyboy):
to?
OpenStudy (otherworldly):
it would be * ^_^ seriously u get stuck on that just get the answer
OpenStudy (otherworldly):
omg @ThatCreepyBoy the answers 18
OpenStudy (thatcreepyboy):
Sorry.
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