D(7, 3), E(8, 1), and F(4, -1)
We calculate the squared distances between the points:



Since
we have a right triangle with hypotenuse DF.
Answer:
it is the 3 one
Step-by-step explanation:
Answer:
The value of a is 101°, b is 79°, c is 83° and d is 97°
Answer:
C
Step-by-step explanation:
The contrapositive is always logically equivalent to the original statement.