Answer:
Segment AD must be congruent to segment DC.
Segment BC must be congruent to segment AB.
Step-by-step explanation:
First one is DC
Second one is AB.
Just did them on edge.
https://media.edgenuity.com/contentengine/frames/63d9a550-8471-11e4-b5f9-bc764e043e0c/8101-03-01-20-01-image1.png
C
2.35 * 10^-4 move the decimal 4 places to the left
.000235
6.5 * 10^-3
move the decimal 3 places to the left
.0065
7.07*10^-5
move the decimal 5 places to the left
.0000707
a=15
Hope it helps