Answer:

Step-by-step explanation:
Given the rhombus CDEF, sides FC and CD are adjacent sides.
Using coordinate geometry, to proof that a quadrilateral is a square, with regards to the slope, the slope of adjacent segments must be negative reciprocals.
In fact, by definition: Two lines with slopes
are perpendicular if:

Therefore if :
- FC and CD are adjacent segments
- Slope of FC=25
For the rhombus to be a square:
Slope of CD 
Answer:
6J
Step-by-step explanation:
This is an answer from another person but here...
Answer: See explanation
Step-by-step explanation:
Population- Every student...
Sample- 10 students sitting together at a table in the cafeteria
Random Sample- 10 Students whose names...
The events are independent, because the events do not affect each other.
Answer:
9 i think but make sure
Step-by-step explanation:
well, a squared+b squared=c squared
13 squared-4 squared is 9 squared