In a certain isosceles triangle, if one angle measures , which could be the measure of any of the other angles?

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In a certain isosceles triangle, if one angle measures <img alt='images' src='https://www.fatskills.com/images2/SAT/eq03139.png'/><!--<m:math display='inline' overflow='scroll' xmlns:m='http://www.w3.org/1998/Math/MathML'><m:mrow><m:mn>4</m:mn><m:mn>0</m:mn><m:mi>°</m:mi></m:mrow></m:math>-->, which could be the measure of any of the other angles?<br><img alt='images' src='https://www.fatskills.com/images2/SAT/eq03140.png'/><!--<m:math display='inline' overflow='scroll' xmlns:m='http://www.w3.org/1998/Math/MathML'><m:mrow><m:mn>40</m:mn><m:mi>°</m:mi></m:mrow></m:math>--> <img alt='images' src='https://www.fatskills.com/images2/SAT/eq03141.png'/><!--<m:math display='inline' overflow='scroll' xmlns:m='http://www.w3.org/1998/Math/MathML'><m:mrow><m:mn>70</m:mn><m:mi>°</m:mi></m:mrow></m:math>--> <img alt='images' src='https://www.fatskills.com/images2/SAT/eq03142.png'/><!--<m:math display='inline' overflow='scroll' xmlns:m='http://www.w3.org/1998/Math/MathML'><m:mrow><m:mn>100</m:mn><m:mi>°</m:mi></m:mrow></m:math>-->