Answer:
Diameter of the circle is
units
Step-by-step explanation:
It is given that the vertices of the square fall on the circle.
So, the diagonal of the square is the diameter of the circle.
Also, the diagonal and the two sides of the square form a right angled triangle.
By Pythogoras theorem,

= 
= 
units
Hence, the diameter of the circle is
units
= -1/2- (-2/5)
= -1/2 + 2/5
find common denominator (2 goes in 10 five times; 5 goes in 10 twice)
= -(5*1)/10 + (2*2)/10
= -5/10 + 4/10
= -1/10
Hope this helps! :)
Answer:
The answer is B.

Step-by-step explanation:

Answer:
I don't think so
Step-by-step explanation:
Because you have two points, then an expression on the other side. Also, why do you have a semicolon?