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Complementary
If two angles are complementary that means that the sum of their angles equal 90°.
If one angle is known, its complementary angle can be found by subtracting the measure of its angle from 90°.
The complementary angle to 70° is 20°.
Supplementary
If two angles are supplementary that means that the sum of their angles equal 180°.
If one angle is known, its supplementary angle can be found by subtracting the measure of its angle from 180°.
The supplementary angle to 135° is 45°.
If two angles are complementary that means that the sum of their angles equal 90°.
If one angle is known, its complementary angle can be found by subtracting the measure of its angle from 90°.
The complementary angle to 70° is 20°.
Supplementary
If two angles are supplementary that means that the sum of their angles equal 180°.
If one angle is known, its supplementary angle can be found by subtracting the measure of its angle from 180°.
The supplementary angle to 135° is 45°.