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Identify the complementary pairs of angles from the following pairs.

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70° and 110°

25° and 65°

35° and 65°

15° and 65°

answer is B.

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Detailed Solution

It is given that we have to identify the complementary pairs of angles.
We know that the complementary angles are those whose sum is

900

If we add the given angles, we can observe that,
Option 1

\Rightarrow 70^{\circ} + 110^{\circ}

\Rightarrow 180^{°}

Option 2

\Rightarrow 25^{\circ} + 65^{\circ}

\Rightarrow 90^{°}

Option 3

\Rightarrow 35^{\circ} + 65^{\circ}

\Rightarrow 100^{°}

Option 4

\Rightarrow 15^{\circ} + 65^{\circ}

\Rightarrow 80^{°}

The only pair of angles that are complementary pair are

250

and

650

.
Hence, the correct option is 2.

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