If two angles of a triangle are complementary then the third angle would be?

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Solution

If two angles are complmentary, then the sum of those angles is 90 degrees.
Since the sum of all three angles must be 180 degrees,
the third angle must be 180-90 = 90 degrees.

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In a triangle if a pair of angles are complementary, then the triangle is a right-angled triangle.

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