Question

plz answer the question. ​

Answer 1

Answer:

CB = Diameter of the circle.

OD is perpendicular to AB.

Therefore, AD = DB

AC and AB are chords of the circle. So, they will be equal.

AC = AB

OD //AC,

By theorem mid point theorem,

AC = 2 OD.

Answer 2

Answer:

Proved below.

Bohot mehnat lagi, isliye brainliest mark kardena.

Step-by-step explanation:

Since, BC is diameter therefore O is midpoint

Since, OD is perpendicular to AB, therefore D is midpoint of AB because perpendicular drawn from centre of the circle bisects the chord.

Therefore, In Triangle ABC,

O and D are midpoints of BC and AB

Therefore OD is half of AC(according to Mid Point Theorem)

OD=1/2AC

THEREFORE, 2OD=AC

AC=2OD

hence proved.