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Mathematics 18 Online
OpenStudy (anonymous):

The chart below describes three triangles. Name of triangles Description Triangle ABC and triangle CFD Similar triangles Triangle ABC and triangle DCE Congruent triangles Triangle CDE and triangle CFG Similar triangles Part A: Write the coordinates of points A, B, C, D, E, F, and G. Part B: Using complete sentences, prove that the coordinates chosen for the points are correct.

OpenStudy (anonymous):

PLease HELP ME!!!

OpenStudy (anonymous):

Someone HELP!

OpenStudy (anonymous):

or tag somone who can help

OpenStudy (anonymous):

HELP!!!!!!!!!!! im so tired

OpenStudy (anonymous):

@Callisto or @Hero haha I don't know who on here is good at geometry, no one seems to like it much xD

OpenStudy (anonymous):

Help

OpenStudy (callisto):

Any missing information?!

OpenStudy (anonymous):

No... its just a table and i posted it up already

OpenStudy (callisto):

coordinates of points A, B, C .... ?! Do you mean that you can simply... make up the numbers?

OpenStudy (anonymous):

yes

OpenStudy (anonymous):

but they have to make sense :)

OpenStudy (callisto):

Alright... Then.... Since every triangle includes a point C. Pick C = (0, 0)

OpenStudy (callisto):

(Just for convenience) Pick some points for A and B... It's easier if A, B, and C form a right angle triangle.

OpenStudy (anonymous):

like which ones

OpenStudy (callisto):

Like this.

OpenStudy (anonymous):

go on.. ;) and thank you

OpenStudy (callisto):

Now, for the first condition, Triangle ABC and triangle CFD -> Similar triangles Angle BAC = Angle FCD Angle ABC = Angle CFD Angle ACB = Angle CDF Now, wisely pick some coordinates for D and F. Don't worry, I won't do it for you.

OpenStudy (anonymous):

so how about 0,2 and 1.5,0?

OpenStudy (anonymous):

since its proportional

OpenStudy (callisto):

Then, it would be a triangle inside triangle ABC Wait...Are you sure triangle ABC and triangle CFD are similar triangles (be careful of the angles...)

OpenStudy (anonymous):

a(0,4) b(2,0) c(0,0) d(-4,0) e(0,8) f(0,2) g(4,0)

OpenStudy (anonymous):

Boom ;p

OpenStudy (anonymous):

replace e and f

OpenStudy (callisto):

Sorry, this one. What do you mean for 'replace e and f' ?

OpenStudy (anonymous):

everyone wins

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