Verified Answer :

Well since the triangle is split into 2 triangles and they both are the same size so BD on the bottom is 15 which means naturally BC must be 30. Five I'm not sure about

Poeticlly
  1. b 

    5. d
    Interior Angle Sum Thereom S = 180(n - 2)  S being sum of the measures of its interior angles , n is for sides

    360 degrees looking at the shape ABDC as a whole.. 180 looking at it as CAD
    90+26= 116
    180-116
    64  
    Angles 
    C = 90degrees
    A= 26 degrees
    D= 64degrees

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