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Mathematics 11 Online
OpenStudy (anonymous):

Help?

OpenStudy (anonymous):

Which fact could you use to help prove that ΔAED~ΔBEC using Side-Angle-Side?

OpenStudy (anonymous):

1. ABIICB 2. CE = (DE) 3.CE= BE DE AE 4. AD=CB

jimthompson5910 (jim_thompson5910):

1. ABIICB is false because AB and CB share a common point (ie they intersect). So they are NOT parallel. So you can eliminate this answer choice

OpenStudy (anonymous):

Oka and it's not 4, I think it's 3.

jimthompson5910 (jim_thompson5910):

as for choice 2, why is DE in parenthesis? Is it supposed to be something like CE = 2*(DE)???

jimthompson5910 (jim_thompson5910):

yes it's definitely not choice 4

OpenStudy (anonymous):

C=1/3 D

jimthompson5910 (jim_thompson5910):

oh ok, thank you

jimthompson5910 (jim_thompson5910):

choice 3 has two fractions right?

OpenStudy (anonymous):

Yes

jimthompson5910 (jim_thompson5910):

then you're 100% correct since the equal ratios point to the fact that the two triangles are similar

OpenStudy (anonymous):

Oka. thanks so much!

jimthompson5910 (jim_thompson5910):

you're welcome

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