Question

Hence, AB is the requiredine segmenci longthum
constructa line segment of length 5 bomusing ruler and compass
Stops of construction: 4*
() Draw a line 1. Marka point Aon this lins,
Place the compass pointer on zero mark the nuter. Open todas
the pencil point upto 56 cm mark,
0 Without changing the opening of the compass, Place the winter on A
and cut an arcate
AB is the required line segmento length 56cm,
Construct AB of length 78 cm. From this out of AC of length 47 cm.
Measure BC.
- 7 en
Steps of construction:
A 21cm 31cm @
0. Place the zero mark of the ruler ata,
(1) Marka point Bat a distance 78cm from A
() Again, Mark a pointCatadistance 47 from A.
Hence, by measuring BC, we find that BC=3.1 cm
Given AB of length 3.9 cm, construct PO such that the length of PO
is twice that of AB.Verify by measurement.
0.4.
(Hint: Construct PX such that length of PX = length of AB ; then cut
yon has the length of AB.)​

Answer 1

Step-by-step explanation:

Construction of Line Segment

Construction of line segment is a drawing using ruler and compass. These are geometrical tools.

In construction of line segment, the result is being verified using scale.It is used in building plan,roads etc.

Draw a line segment of length 3.9 cm using a ruler.

Solution :

Step 1: Draw a line l. Mark a point on the line l.

Step 2: Place the compasses pointer on the zero mark of the ruler. Open it to place the pencil point upto 3.9 cm.

Step 3: Taking caution that the opening of the compasses has not changed, place the pointer on A and swing an arc to cut l at B.

Step 4: segment AB is a line segment of required length.

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Construct a copy of a given segment.

Step 1: Draw line segment CD of any length.

Step 2: Fix the compasses pointer on C and the pencil end on D. Now this opening of the compasses gives the length of segment CD.

Step 3 : Draw a line l. Mark a point A on the line l. Without changing the compasses setting, place the pointer on A.

Step 4 : Cut an arc that cuts l at a point B. Now, AB is a copy of CD.