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Mathematics 21 Online
OpenStudy (crashonce):

E is the midpoint of AB. AD:DC = 2:1. Area of BEC: Area of CDE : area of AED = ?

OpenStudy (crashonce):

|dw:1419812273990:dw|

OpenStudy (crashonce):

@perl

OpenStudy (crashonce):

@jim_thompson5910

jimthompson5910 (jim_thompson5910):

I'm not even sure of what they're asking exactly.

jimthompson5910 (jim_thompson5910):

do they want the area of AED or do they want the ratio of the areas (if so, which areas?)

OpenStudy (crashonce):

find the ratio of the areas stated in the question

OpenStudy (triciaal):

@jim_thompson5910 CEA and ADE 90 degrees correct?

jimthompson5910 (jim_thompson5910):

I don't think there is enough info to say yes or no

OpenStudy (perl):

maybe you can upload a picture or diagram

OpenStudy (crashonce):

ive given all the provided info including a diagram

OpenStudy (perl):

there was not a diagram provided, sometimes its easier if we see the original

OpenStudy (crashonce):

I cant upload the original, what ive drawn is the given diagram

OpenStudy (perl):

thanks :)

jimthompson5910 (jim_thompson5910):

If triciaal's assumption is correct, and we can say CEA and ADE 90 degrees, then the book authors would have put in these square angle markers |dw:1419814038490:dw| IF that assumption is true, then there is a way to connect the areas to form ratios. However, that info isn't given so I don't think it's safe to assume that.

OpenStudy (perl):

|dw:1419814062023:dw|

OpenStudy (crashonce):

there is no assumption, e is the midpoint and that's it

OpenStudy (triciaal):

I think since BE = AE then EC is the perpendicular bisector so that would make it 90 degrees

OpenStudy (crashonce):

it isn't given

jimthompson5910 (jim_thompson5910):

triciaal, you can have a bisector that isn't perpendicular

OpenStudy (triciaal):

CBE = CAE this has to do with similar figures but need to match the correct sides for the ratio. given the proportion 2:1

OpenStudy (sirm3d):

just draw altitudes. area or BEC = area of BEA (the two triangles share a common altitude)

OpenStudy (sirm3d):

|dw:1419814777437:dw|

OpenStudy (sirm3d):

|dw:1419814942411:dw| base of BEC is BE, height is XC, base of AEC is AE, height is XC. equal bases, equal heights.

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