Triangle with one 90degree Angle
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http://www.lerc.nasa.gov/Other_Groups/K12/p_test/math_9/math_p_q25.html  


NASA Lewis Learning Technologies Project  
A triangle with one 90 degree angle is always: an equilateral triangle; an acute triangle; an obtuse triangle; or, a right triangle? A detailed answer is provided. From NASA's 9th Grade Math Proficiency Test.  


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Math Topics:  Triangles and Other Polygons 
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