Let us understand this with the help of a diagram as shown below.
The figure shows a circle with center O.
Here we have three radii.
First radius = AO
Second radius = OB
Third radius = CO
We have two cases here:
Case 1:
Now If we join radius AO and OB we will get diameter AOB.
So in this case we can say that if we two radii join to form a diameter.
Case 2:
Now let us consider radius AO and CO.
Here if we try to join them , then they will not form a diameter.
So here we can say the two radii do not join to form a diameter.
Answer:
Two radii always form a diameter. This statement is false.