If 'a' and 'b' are two angles of a triangle, then the third angle will be 180 - (a+b) degrees.

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180

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Solution

The correct option is A
90

The angle sum property of a triangle states that the sum of the interior angles of a triangle is 180 $^{\circ}$ .
'a' and 'b' are the two angles.
Let the third angle be x degrees.
Then, a + b + x = 180
x = 180 - (a+b)

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