Question 951502
"Triangle DEF has angles that measure 64 degrees and 77 degrees"


x is the missing angle


x+64+77 = 180
x+141 = 180
x = 180-141
x = 39


The missing angle for triangle DEF is 39 degrees.


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Any dilation of DEF will also have angles of 64, 77, and 39 degrees. In any order. 


So that's why the answer is <font color="red">2)D'E'F' with angles that measure 77 degrees and 39 degrees</font>


The other choices are wrong because of the '48 degrees'

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