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Mathematics 9 Online
OpenStudy (anonymous):

The angle bisectors of XYZ intersect at point A, and the perpendicular bisectors intersect at point C. AB_XZ What is the radius of the inscribed circle of XYZ?

OpenStudy (anonymous):

OpenStudy (anonymous):

@eliassaab are you on?

OpenStudy (anonymous):

i need to find it in units

OpenStudy (anonymous):

It is 10.3 let me explain why

OpenStudy (anonymous):

AYZ is isoceles Hence XYZ is isoceles, therefore XA is perpendicular to YZ. This implies that C is on the bissector of YXZ. That shows that C , A nad X are on he same line. Hence CX is the radius CX =CA +AX = 3.3 + 7= 10.3

OpenStudy (anonymous):

thats not one of my choices

OpenStudy (anonymous):

the radius of the inscribed circle XYZ 3.3 4.5 7 9 11

OpenStudy (anonymous):

I misread the question. I found the radius of the circumscribed circle. Hold on

OpenStudy (anonymous):

The center of it is A and the radius is AB=4.5

OpenStudy (anonymous):

what is the formula for that?

OpenStudy (anonymous):

XYZ=

OpenStudy (anonymous):

9

OpenStudy (anonymous):

The center is the intersection of the 3 bisectors. So A is the center. The radius is the distance from A to any of the three sides which are all equal. In this case, we are given one of the distances AB=4.5

OpenStudy (anonymous):

So its that simple?

OpenStudy (anonymous):

The rest was given to confuse the situation.

OpenStudy (anonymous):

I know how to find the radius and I don't know why I was so thrown off. Well they did a good job at confusing me. Thank you!!!!

OpenStudy (anonymous):

@eliassaab how did you find the radius of the circle circumscribing the triangle?

OpenStudy (anonymous):

The center is the intersection C of the perpendicular bisectors. The radius is CX=CY=CZ

OpenStudy (anonymous):

Oh..how stupid of me! Thanks anyways! :D

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