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Question

For constructing a right angle without a protractor, which of the following method/s is/are used?


A

Angle Bisector

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B

60 angle construction

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C
Median
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D

Construction of triangle

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Solution

The correct option is B

60 angle construction


To construct a right angle triangle, the following steps should be followed:

1. Draw a line OB of given length.
2. With O as centre, make an arc of any radius intersecting OB at X.
3. With X as a centre, draw another arc keeping the radius same intersecting the previous arc at D.
4. DOB will be 60.
5. With D as a centre and keeping the radius same, draw another arc intersecting the first arc at C.
6. COB will be 120 .
7. Bisect COD drawing two equal arcs from each points intersecting at E.
8. Join EO and extend till A. AOB will be 90.
So, it can be seen that both 60 and angle bisector construction is used in the process.


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