Mathematics Knowledge Question

As an ASVAB tutor, I realize that geometry is an important part of the Mathematics Knowledge section of the ASVAB.  I remind the students in my ASVAB prep course of the importance of knowing both algebra and geometry for the Mathematics Knowledge section.  I remind my students that this is the easiest section to improve upon once you know the formulas and how to solve for x.  Today’s question is about a triangle.  To answer this one correctly, it is essential to know the measure of a right angle and to know the sum of the angles in a triangle.  Do you know the answer to this question.