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Mathematics 15 Online
OpenStudy (helpmeplsoml):

help with geometry please will medal

OpenStudy (helpmeplsoml):

http://prntscr.com/dlgyms

OpenStudy (sooobored):

is the triangle a right triangle?

OpenStudy (helpmeplsoml):

@myininaya @Zarkon @Whitemonsterbunny17

OpenStudy (helpmeplsoml):

it 4,5 ?

OpenStudy (helpmeplsoml):

yes it's a right triangle, 2 of the points have the same x value, yeah?

OpenStudy (helpmeplsoml):

then the other has the same y value

OpenStudy (sooobored):

ok, now are you familiar with right triangles inscribed in a circle?

OpenStudy (helpmeplsoml):

not very well

OpenStudy (sooobored):

ok, this is a pretty important key definition, but whenever you inscribe a right triangle within the circle, then the hypothense (long side) of the triangle will be the diameter of the circle

OpenStudy (helpmeplsoml):

alright

OpenStudy (sooobored):

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OpenStudy (helpmeplsoml):

http://prntscr.com/dlh3t3

OpenStudy (sooobored):

its asking for a circumcenter not a circumference @ilovemath14 now the circumcenter of a triangle is when you draw a circle such that the edge of the triangles all touch the circle, and the circumcenter is the center point of that circle

OpenStudy (helpmeplsoml):

that is 4,5

OpenStudy (sooobored):

ah, yes (4,5) if you're going to denote a point, putting it in parenthesis helps makes it clear

OpenStudy (sooobored):

since, all you need in the first problem is to determine the midpoint between EG since this line segment is the diameter of the circle and the circumcenter would be the center point of this line segment

OpenStudy (helpmeplsoml):

180 = 4x+(3x+1)+(7x+11) with x=12 right?

OpenStudy (sooobored):

yea

OpenStudy (helpmeplsoml):

so i plug in x=12 4(12)=48 3x+1=37 7x+11=95

OpenStudy (helpmeplsoml):

so the last one is the longest ?

OpenStudy (sooobored):

ok, here, it is important that you draw a simple picture to help you picture it and yes, angle C is the largest angle, hence the side opposite to it would have the longest side

OpenStudy (sooobored):

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OpenStudy (sooobored):

the side length associate with C would be AB or BA see?

OpenStudy (sooobored):

triangle not drawn to scale

OpenStudy (helpmeplsoml):

right

OpenStudy (sooobored):

angle A corresponding side would be BC or CB hence the order of angles from low to high would be B A C

OpenStudy (sooobored):

now you need to find the order of sides that correspond to angle B-A-C

OpenStudy (helpmeplsoml):

corresponding to B is AC?

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