Step-by-step explanation:
Are you sure you wrote the answers correctly?
Answer:
Option A. 
Step-by-step explanation:
we know that
In the right triangle MNL
Applying the Pythagoras Theorem

substitute the values


Answer:
2
Step-by-step explanation:
Answer:
r = 5 cm
Step-by-step explanation:
A = πr²
78.53 = (3.14)r²
divide by 3.14
25 = r²
r = ±5
r = 5