# Complementary Angles

Two angles whose add is ninety degrees are referred to as angles. 2 angles that add up to ninety degrees are called angles. for instance, 30° and 60.

The sum of the measurement of two angles decides whether an angle is supplementary or complementary. When the sum of the two angles is equal to the measurement of a right angle then the pair of angles is said to be complementary angles

## Definition of complementary angles?

Two points are supposed to be integral points assuming they amount to 90 degrees. All in all, when correlative points are assembled, they structure a right point (90 degrees). Point 1 and point 2 are integral if the amount of both the points is equivalent to 90 degrees (for example point 1 + point 2 = 90°) and along these lines, point 1 and point 2 are called supplements of one another.

IF 60° + 30° = 90°. Consequently, from the “Meaning of Complementary Angles”, these two points are reciprocal. Each point among the integral points is known as the “complement” of the other point. Then,

60° is the complement of 30°.

30° is the complement of 60°.

On the off chance that the amount of two points is equivalent to the estimation of a right point then the sets of points are known as the complementary angle. There are two kinds of complementary angles in math as given underneath:

Adjacent Complementary Angles: Adjacent Complementary Angles: Two complementary angles with a common vertex and a common arm are called adjacent complementary angles.

Nonadjacent Complementary Angles: Two complementary angles that are NOT adjacent are said to be non-adjacent complementary angles.

## How to Find Complement of an Angle?

We know that the add of 2 angle is ninety degrees and every of them is claimed to be a “complement” of the opposite. The complement of an angle is found by subtracting it from 90 degrees. The complement of is 90-x°. Now let’s find the complement of the angle 47°. The complement of 47° is obtained by subtracting it from 90°, i.e. 90° – 47°  = 43°. Thus, the complement of 57° angle is 43°.

### Properties of a Complementary Angle

• Two angles are supposed to be complementary if they amount to 90 degrees.
• At least three angles can’t be complementary regardless of whether their aggregate is 90 degrees.
• Assuming that two angles are complementary, each angle is known as the “complement” or “complement angle” of the other angle.
• Two intense angles of a right-angled triangle are complementary.

### Complementary Angles Theorem

If the add of 2 angles is ninety degrees, then we are saying that they’re complementary. every of the complement angles is acute and positive. Let’s study the angle theorem with its proof. The complementary angle theorem states, “If 2 angles are complementary to identical angle, then they’re congruent to every other”.

## Proof of Complementary Angles Theorem

We know that angles exist in pairs and add up to ninety degrees.

• Let us assume that ∠XOY is complementary to ∠AOX  and ∠YOZ.
• Now as per the definition of complementary angles, ∠XOY + ∠AOX = 90° and ∠XOY + ∠YOZ = 90°.
• From the above two equations, we can say that “∠XOY + ∠AOX = ∠XOY + ∠YOZ”.
• Now subtract ‘∠XOY’ from both sides, ∠AOX = ∠YOZ.
• Hence, the theorem is proved.

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