Answer:
36 cm
Step-by-step explanation:





r=18 cm
diameter= d= 2r
d= 2(18cm)= 36 cm
I dont think this may be right but i think it is 401
D is correct:
because of doing the correct steps:
step1: put the point of your compass on the left endpoint of the segment, A.
Open the compass to be more than half the length of the segment. Then leave a half-circle mark.
step2: do the same thing on the other point B. and find the middle point.
Answer:
negative 2 square root of 10 over 7
Step-by-step explanation: