Question 239626
Hello!  I'll try to summarize some things here for you.
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As we you know, all triangles have 3 sides forming 3 angles.  
The sum of all angles must always add up to 180 degrees.
In the case of isosceles triangles, 2 of its sides and 2 of its angles must equal to each other.  It does not matter their measurement, as long as both are the same.
There is one kind of isosceles triangle that we call a "right isosceles triangle".  This triangle has one angle of 90 degrees and the other 2 are exactly 45 degrees each.
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If you need to see some illustrations, I recommend: http://www.mathsisfun.com/triangle.html
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I hope this helps you.  Otherwise, please keep posting questions.