The sides of an isosceles triangle have lengths 5,10 and 10. what are the the measures of its angles?

75.522, 75.522, and 28.955. The smallest angle goes at the peak of the two longest lines. Like having 2 equal and one different line in an isosceles triangle, the angles follow suit. The angle size really depends on the length of the lines- the longer the lines, the smaller the angle (usually). 
I would show you the math to get these, but I'm on an old computer and it's a pain to try to do lots of spaces instead of a tablol

That. you would have multiple