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The figure below shows triangle PQR with a circumscribed circle of radius 7 inches. http://assets.openstudy.com/updates/attachments/505b3fd4e4b0cc122893ea30-renee99-1348157619927-456845882011121142pm1902385864.png Which segment must measure 7 inches? A. segment RO B. segment RQ C. the angle bisectors D. the perpendicular bisectors

Mathematics
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there's also this one: Look at triangle PQR. http://assets.openstudy.com/updates/attachments/505b3fd4e4b0cc122893ea30-renee99-1348157849369-456845882011122801pm596145625.png Segment QX is an angle bisector. Which statement must be true? A. length of segment XP = 6 inches B. length of segment XQ = 4 inches C. measure of angle XQR = measure of angle XQP = 35˚ D. measure of angle QRX = 180˚ – (90˚+ 35˚) = 180˚ – (125˚) = 55˚ I think the answer is A, is that right?
I don't know the first one, but I think the second one is A
Segment QX is an angle bisector. What do you understand by this?

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Other answers:

i cut the triangle in half
it*
It divides the angle into two
and half of 12 is 6 so that's where I get my answer...
It does not divide the side, it only divides the angle.
ohh okay.
In case of an isosceles triangle, it divides the opposite side also.
well, I know its not C nor B
Why not C?
because the measure of angle XQR is 70 not 35 right
wait, looking at the wrong problem...
hold on im mixed up, was looking at the other problems pic... lol
but yeah, the angle is 70 and not 35 isnt it?
Angle PQR is 70
ohhh, okay, then that would make C the answer
Right
because half of 70 is 35! okay thanks so much! could u maybe help me with the first one now?
Which length is the radius for first question?
well, its says a circumscribed circle of radius 7 inches, which kind of confuses me, but I always thought the radius was the doted line?
Dotted line is the radius
okay, so now how do we find the measure that equals 7 inches?
Why did you think the dotted line is the radius?
Idk, I think its a subconscious thing, I just remember that the dotted line should be the radius?
I remember learning that about radius in school
If you want to conclude that OR is radius, then you must prove that O is the centre of the circle.
here's where circumcentre comes into play
okay... so then would that mean that the answer is A, since we're saying it's the radius?
Answer is right, but you cannot just conclude that OR is radius. The main question is that you need to prove that OR is radius
okay, isn't there a formula for that, I don't have my formula sheet with me, but if I remember correctly, isn't something like 3.14(R)^2
I cant remember the exact formula
No need of any formula
Do you know what does circumcentre mean?
where the three perpendicular bisectors meet?
And it's also the centre of circle
In the picture, two pependicular bisectors meet, which means the third perpendicular bisector would also meet at the same point.
by this you can conclude that O is the centre of circle.
And OR is the radius
gotcha, thanks for ur help! I really really appreciate it!
No problem
Are you good at chemistry?
somewhat, im taking chemistry this year...
I know the basic;s of chemistry pretty well
basic's*
What is hardwater?
I believe hard water is water that has high mineral content...
or something like that, not sure, look it up?
Ok, thanks
np :)

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