What is 180 degree angle?

The angle which forms a straight line is chosen the 180-caste bending. In geometry, nosotros will be introduced to different types of angles, such equally acute bending, birdbrained angle, right angle, straight angle, reflex angle and full rotation. The angle which measures 180 degrees is named the straight angle. The other angles are given here:

Astute angle: The angle which is more 0° and less than ninety°
Right angle: The bending which is equal to ninety°
Obtuse angle: The angle which is more than 90° merely less than 180°
Reflex angle: The bending which is more than 180°
Full rotation angle: The bending equal to 360°

180 degree angle 1

In this article, y'all will learn how to measure out the angles 180 degrees using a protractor, how to construct the 180 degree angle using a compass along with steps and structure images.

180 Caste Bending Proper name

The artillery which form 180 degree angle is a directly line which tin be observed from the beneath figure and thus, 180 degree angle is known every bit straight angle.

180 degree angle 2

How to Find 180-Degree Angle?

To measure any angle we can directly employ a protractor or a compass. Here are the steps to find a 180° angle, given in a plain canvass.

Draw a straight line which will be the arm of the angle.
Put a dot at one end of the line. This dot denotes the vertex of the angle
Now place the center of the protractor above the dot or vertex and match the baseline of the protractor forth with the arm of the bending.
Marking the angle 180 degrees with a dot.
At present bring together this dot to the vertex of the bending, which forms the second arm of the angle.

Hence, we get a straight angle.

180 degree angle 3

How to Describe a 180-Caste Bending Using a Compass?

To draw the direct angle using a compass follow the beneath steps.

First, draw a straight line using a ruler or scale and proper noun information technology every bit XY.
At present mark a signal O in anywhere between X and Y.
With O as a eye point, describe an arc of any radius using a compass, from the left of point O to the right of O.
This arc cuts the straight line at betoken P and Q.
Hence, the angle POQ is the required 180 degrees.

180 degree angle 4

Cheque: To bank check if the bending is 180 caste or non, you can use a protractor past keeping the center of the protractor at the top of indicate O and measuring the bending POQ.

Besides, read: Lines And Angles

Tabular array of Angles

As per the definition of different angles present in geometry, hither is a brief description for each angle. Suppose θ is whatsoever angle, then;

Blazon of angle	Measure of bending
Acute angle	0° < θ < xc°
Right angle	θ = 90°
Obtuse angle	xc° < θ < 180°
Straight bending	θ = 180°
Reflex bending	180° < θ < 360°
Full rotation(or Complete angle)	θ = 360°

Solved Examples

Q.1: If a straight angle is divided into two parts, and one angle measures 60 degrees, then find the other angle.

Solution: Permit the unknown bending is x

Given, another angle = 60°

Nosotros know that;

Straight angle = 180°

Therefore,

10+60 = 180

x = 180 – 60

ten = 120°

Hence, the other bending measures equal to 120°.

Q.2: Two angles are supplementary. If one bending is equal to 45 degrees, find the other angle.

Solution: Given, two angles are supplementary, thus the sum of the two angles forms a 180-degree angle.

At present given one angle is 45 degrees.

Permit the other angle is ten.

Thus,

45 + x = 180 {Supplementary angles adds up to 180 degrees}

x = 180 – 45 = 135 degrees

Q.3: If two angles are equal to each other and too supplementary, then discover the angles.

Solution: Given, ii angles are equal. Permit the angles be x.

Also, given two angles are supplementary, therefore,

ten + x = 180°

2x = 180°

x = 180/2

x = 90°

Therefore, both angles are 90° each.

Visit www.byjus.com to learn how to construct dissimilar angles and also download BYJU'S – The Learning App for more information on types of angles.

Frequently Asked Questions – FAQs

What is the 180-caste angle?

The 180-degree angle is chosen a straight angle.

What does a 180-degree angle appear similar?

A 180-degree angle looks like a straight line.

How to find a 180-degree angle?

Nosotros can easily draw a 180-caste angle using a protractor or a compass.

How many 90 degree angles are in a 180-caste angle?

2 90 degrees angles add upward to a straight angle.

Is the direct angle and 180 -degree angle the aforementioned?

Yes, straight angle and 180-caste bending are the same.

What are 180 degrees for a triangle?

For a triangle, the sum of all the interior angles is equal to 180 degrees. Also, the sum of each interior angle and exterior angle of a triangle is 180 degrees. Thus, the pair of an interior angle and exterior angle of a triangle results in a straight angle.

How to Draw a 180 Degree Angle TUTORIAL