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from CHRIST CHURCH BOY'S SR.SEC. SCHOOL, asked a question
Subject: Math , asked on 27/10/12

how to make 110 &80degree angle with the help of compass & ruler

The angles which can easily be constructed with the help of a compass are multiples of 15 like 15Â°, 30Â°, 75Â°, 90Â°, 120Â°, 135Â°, 150Â°, 180Â° etc.

The mentioned angles i.e., 80Â° and 110Â° can easily be made with the help of protractor and ruler.

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these angles can not be constructed using compasses & rulers.

only angles which are divisible by 7.5 degree can be constructed using a compass. you can use a protractor to construct these.

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it is not possible

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udit,

angles which can be easily made with compass and ruler are 15, 30 , 45, 60, 75, 90, 105, 120, 135, 150, 165, 180...and so on.

or you can say multiples of 15 degreesor angles made by bisecting them.

this is because

when we make 60 degree.

we actually make an equilateral triangle with compass where each angle is 60 degrees and then we bisect them.

so it is not possible to make angles like 110 , or 80 degreees.

hope it helps!!!

cheers!!!

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