Sum of two interiors=exterior
If triangles are congruent then, their corresponding sides and angles should have the same measurement. From the given, STU is congruent to VWX, angle S, T, U should be congruent to angles V, W, and X, respectively. From the choices, the answer should be letter D. because U and V do not appear in the same order from both names.
1/4+5/4=1.5
1.5 divided by 4 = 0.5625
All you do is add up all your sides! So if your shape has 4+4+5+5 = 18. All you do is add them up!
