Vertical angles are formed when 2 lines meet each various other at a point. Lock are constantly equal to each other. In various other words, whenever 2 lines overcome or crossing each other, 4 angles space formed. We have the right to observe that 2 angles that room opposite to each various other are equal and also they are called vertical angles. They are also referred to as 'Vertically the contrary angles' as they lie opposite to each other.

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1.What space Vertical Angles?
2.Vertical angles Theorem
3.Vertically Opposite angle Worksheet
4.FAQs on vertical Angles

What are Vertical Angles?

When 2 lines intersect, four angles are formed. There room two bag of nonadjacent angles. These pairs are dubbed vertical angles. In the image provided below, (∠1, ∠3) and (∠2, ∠4) space two vertical angle pairs.

Vertical angles Definition

Vertical angles space a pair the non-adjacent angles formed by the intersection the two right lines. In an easy words, vertical angles room located across from one one more in the corners that the "X" formed by two straight lines. They are likewise called vertically opposite angle as lock are situated opposite to each other.


Vertical angle Theorem

Vertical angles theorem or vertically opposite angle theorem claims that 2 opposite upright angles developed when 2 lines crossing each other are always equal (congruent) to each other. Let's learn around the vertical angle theorem and its evidence in detail.

Statement: Vertical angles (the opposite angle that are created when 2 lines intersect each other) are congruent.

Vertical angles Proof

The proof is basic and is based on straight angles. We already know that angle on a straight line include up to 180°.


So in the over figure,∠1 + ∠2 = 180° (Since they space a direct pair of angles) --------- (1)∠1 +∠4 = 180° (Since they space a straight pair that angles) --------- (2)From equations (1) and (2), ∠1 + ∠2 = 180° = ∠1 +∠4.According to transitive property, if a = b and b = c then a = c.Therefore, we deserve to rewrite the statement together ∠1 + ∠2 = ∠1 +∠4. --------(3)By removed ∠1 top top both sides of the equation (3), we acquire ∠2 = ∠4.Similarly. We deserve to use the same set of statements come prove that ∠1 = ∠3. Therefore, us conclude the vertically opposite angles are constantly equal.

To uncover the measure of angle in the figure, we usage the right angle property and vertical angle theorem simultaneously. Let united state look at part solved examples to understand this.

Vertically Opposite angles Worksheet

The adhering to table is is composed of creative vertical angles worksheets. These worksheets are straightforward and totally free to download. Try and practice couple of questions based upon vertically the opposite angles and enhance the knowledge around the topic.

Vertical angle Worksheet - 1

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Vertical angles Worksheet - 2

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Vertical angle Worksheet - 3

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Vertical angles Worksheet - 4

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Important Notes

Vertical angle are always equal.Vertical angles have the right to be supplementary and complimentary.Vertical angle are always nonadjacent.

Topics regarded Vertical Angles

Check out some interesting write-ups related to upright angles.

Example 1: discover the measure up of ∠f native the figure using the vertical angle theorem.



In the image given below, we deserve to observe the AE and also DC room two directly lines. Here, ∠DOE and also ∠AOC room vertical angles.

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118° = 90° + ∠f

∠f = 118° - 90°

∠f = 28°

Therefore, ∠f = 28°

Example 2: In the number shown below ∠f is equal to 79° since vertically opposite angles room equal. Is the statement right? Justify your answer.



Here, 79° and also f are situated opposite, yet they room not vertical angle as the angles are not formed by the intersection of two straight lines. Here, BD is not a directly line. Therefore, ∠f is not equal come 79°. The provided statement is false.

Example 3: If angle b is three times the dimension of edge a, find out the worths of angle a and b by using the vertical angles theorem.



From the figure, we deserve to observe the 80° and also the sum of the angle a and also b room vertically opposite. Which means ∠a + ∠b = 80°. The is offered that ∠b = 3∠a. Substituting the worths in the equation the ∠a + ∠b = 80°, we get, ∠a + 3∠a = 80°