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Question

Two angles of a triangle are 60o and 40o. Find its third angle.


A

80o

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B

85o

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C

70o

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D

60o

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Solution

The correct option is A

80o


Given that - Two angles of a triangle are 60o and 40o.

Sum of angles of a triangle = 180o

Therefore third angle = 180o(60o+40o)

= 80o


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