Two joining rays make an angle. The common allude where these 2 rays satisfy is referred to as the vertex and also the rays are referred to as arms of the angle.

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The meacertain of an angle is the amount of turn or rotation of a point from one arm to another alengthy its vertex.

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When the arms of the angle lie in the oppowebsite direction, they develop a straight angle. The angles make a directly line via the vertex.

A straight angle is likewise dubbed ‘level angle’.

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In the picture, OX and OY are the arms of an angle. The widespread allude O wbelow the rays satisfy is called the vertex.

How to recurrent a straight angle?

Tright here are miscellaneous methods to reexisting right angles as per the measurement device.

It is written as 180°

It is also composed as π

All angles provided in the photo are directly angles.

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Properties of a straight angle

A directly angle is formed by rotating one ray by 180°through respect to one more ray.

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In a right angle, the angle rays face in the oppowebsite directions.

A directly angle reverses the direction of a point

A directly angle is exactly half of a transformation.

A right angle deserve to additionally be formed by adding 2 best angles.

Drawing a directly angle using a protractor

Draw a straight-line OA, with an arrowhead at A.

Now save the protractor on this line such that the baseline of the protractor is aligned over OA. The A need to be pointing towards the 0°of the protractor.

Start from 0° and also move in the direction of 180° noting of the protractor. On getting here at 180°, mark a allude B on the paper.

Join the vertex of the line OA with the allude B. the second ray OB will certainly have actually the arrowhead at B.

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Straight angles in genuine life

The inclined plane of a staircase represents a straight angle.

The directly angle of a see-witnessed.

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Fun Facts

Straight angles look choose a right line, but it has actually 2 arms. On the other hand, a straight line has just one arm that points in one direction.