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precal
 one year ago
Isosceles Triangle Problem
precal
 one year ago
Isosceles Triangle Problem

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0\(\Delta BDE\) and \(\Delta CDF\) are similar. You know this because angles \(\angle ABC\) and \(\angle ACB\) are congruent, and they are both right triangles, so the remaining angles \(\angle BDE\) and \(\angle CDF\) must also be congruent.

precal
 one year ago
Best ResponseYou've already chosen the best response.0Did I mention I can't use a calculator at all?

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1i don't think we need a calculator for this question hmmmm according to what he/she said: we can set up a proportion: i was looking at this link ( http://www.mathplanet.com/education/geometry/similarity/triangles ) : if the triangles are similar then their corresponding sides are proportional

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1dw:1444252141871:dw we can separate both right triangles dw:1444252199454:dw \[\huge\rm \frac{ BD }{ CD } = \frac{ DE }{ DF}\] given `DE : DF ` 5:7 and bec BD/CD is equal to DE/DF we can say the ratio of `BD :CD` is also 5:7

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1make sense or not ?? hmmmm

Nnesha
 one year ago
Best ResponseYou've already chosen the best response.1BD : CD = 5 :7 BD/CD = 5/7 and we know BD + CD = 48 suppose BD = 5y and CD = 7 y dw:1444254518735:dw
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