Q. 25.0( 2 Votes )
A triangle can be
For a proper triangle the sum of all interior or internal angles should be equal to 180°.
Now let us take each option separately,
For option A:
110° + 40° = 140° and so the third angle is 40°.
For Option B:
70° + 115° = 185° which is greater than 180° which is not correct.
For option C:
135° + 45° = 180°. Here the sum is already 180° without considering the third angle which is incorrect.
For option D:
90° + 90° = 180°. Here the sum is already 180° without considering the third angle which is incorrect.
So it is clearly observed that only option A is satisfying the angle condition of the triangle.
So the correct answer is A.
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