CBSE Class 9 Answered
O is the circumcentre of the 
ABC and D is the mid point of the base BC.
Prove that 
BOD = A.
ABC and D is the mid point of the base BC.
Prove that BOD = A.
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
Expert Answer
OD
BC [A line drawn through the centre of a
circle bisecting a chord is to the chord]
In
rt. 
OBD and OCD
OB = OC (radii)
OD = OD (common)
ODB
= ODC [each
90o]
(The angle subtended by
an arc at the centre is double the angle subtended by it at any point on the
remaining part of the circle.)
From (i) and (ii)
BOD
= A
Answered by | 04 Jun, 2014, 03:23: PM
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