An instrument used to construct an angle is :

Ruler

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Divider

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Set square

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Protractor

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Solution

The correct option is D
Protractor

We have seen that Ruler is used for measuring a length. A divider is used to take a fixed length and use it for future. Set-square is used to draw angles of which they are made.

Like a set-square of $45^{\circ}$ - $45^{\circ}$ - $90^{\circ}$ is used to make $45^{\circ}$ or $90^{\circ}$ angles. Also, set-squares are used to measure length.

A Protractor is widely used to construct angles which are marked on it. It looks like a semi-circle.

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Similar questions

Q. Draw an angle of

80^{\circ}

using a protractor and divide it into four equal parts, using ruler and compasses. Check your construction by measurement.

Q. Draw an angle of

40^{o}

using protractor. Now with the help of ruler and compass, construct an angle to this angle.

Construct an angle of ${22.5}^{\circ}$ without using protractor. Any of the other geometric instruments can be used. [3 MARKS]

Question 8

Out of the given four options, only one is correct. Write the correct answer.

The instrument to measure an angle is a

(a) ruler (b) protractor (c) divider (d) compass

Construct an angle of $45^{\circ}$ without using protractor by the method of angle bisection. Any of the other geometric instruments can be used.
[3 MARKS]

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