AOB if BOD =90 degree and COD=30degree in the given figure AOC is a straight line. OB and OD are rays. calculate the following:
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Step-by-step explanation:
Correct option is A)
A straight angle always measures 180
o
Given that, ∠AOC+∠BOD=90
o
But, ∠AOC+∠BOD+∠COD=180
o
(straight angle)
∴∠COD = 180 - ∠AOC+∠BOD
∴∠COD = 180−90=90
o
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