A question from pre rmo 2015

Geometry Level 3

Suppose we have a right triangle A B C ABC with right angle B B .

There are points D , E , D, E, and F F on sides A B , A C , AB, AC, and B C , BC, respectively, such that A D = A E AD = AE and C E = C F . CE=CF.

What is the measure of angle D E F DEF ?

45 90 60 none of these 0 30

Dhaval Pandya by Dhaval Pandya , 21, India

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