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Question

Two angles of a triangle are 50​ and 70​. The third angle is:


  1. 50

  2. 120

  3. 70

  4. 60


Solution

The correct option is D

60


The sum of all the angles of a triangle is 180​.

Therefore,
Third angle=180 (  50 + 70 )                   =180 (  120 )                   =60

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