Answer:
2.1.25
Step-by-step explanation:
2: 1.25
3:125.0
Answer: The center is (5,-1) and radius is 6.
Step-by-step explanation: The equation: (x-h)^2+(y-k)^2=r^2 is really important. Since we have 36 equal r^2, square root it to get 6. And the center would be 5, because (x-5) but do the opposite operation, same for y+1.
We do not know the length of any of the sides, therefore we can not prove triangle congruence.
Answer:
No, its not a right triangle
Step-by-step explanation:

16 + 64 = 81
80 = 81