Construct of length 7.8 cm. From this, cut off of length 4.7 cm. Measure.

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Solution

(1) Draw a line l and mark a point A on it.

(2) By adjusting the compasses up to 7.8 cm, draw an arc to cut l on B, while putting the pointer of compasses on point A.

is the line segment of 7.8 cm.

(3) By adjusting the compasses up to 4.7 cm, draw an arc to cut l on C, while putting the pointer of compasses on point A. is the line segment of 4.7 cm.

(4) Now, put the ruler along with this line such that 0 mark of the ruler will match with point C.

On reading the position of point B, it comes to 3.1 cm. is 3.1 cm.

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Question 3

Construct $¯ ¯¯¯¯¯¯ ¯ A B$ of length 7.8 cm. From this cut off $¯ ¯¯¯¯¯¯ ¯ A C$ of length 4.7 cm. Measure $¯ ¯¯¯¯¯¯ ¯ B C$ .

¯ ¯¯¯¯¯¯ ¯ A B

¯ ¯¯¯¯¯¯ ¯ A C

¯ ¯¯¯¯¯¯ ¯ B C

¯ ¯¯¯¯¯¯ ¯ A B

¯ ¯¯¯¯¯¯ ¯ A C

¯ ¯¯¯¯¯¯ ¯ B C

¯ ¯¯¯¯¯¯ ¯ A B

¯ ¯¯¯¯¯¯ ¯ A C

¯ ¯¯¯¯¯¯ ¯ B C

¯ ¯¯¯¯¯¯ ¯ A B

¯ ¯¯¯¯¯¯ ¯ A C

¯ ¯¯¯¯¯¯ ¯ B C

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