In a rectangle, opposite sides are ____ which means ___ congruent to ____. Triangles ABC and.CDA can be proved congruent by hypotenuse-Leg because ___ is the hypotenuse for both triangles 
 Blank 1 option: straight, congruent, similar or unequal
 Blank 2 option: BC, AB, AC or none of these 
 Blank 3 option:CA, BA, DA, or none of these
 Blank 4 option:AB, AC, AD, DC