Constructions of a Line Parallel to a Given Line at a Given Distance from It.
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Draw a line MN = 5.8 cm. Locate a point A which is 4.5 cm from M and 5 cm from N. Through A draw a line parallel to line MN.
Draw a straight line AB = 6.5 cm. Draw another line which is parallel to AB at a distance of 2.8 cm from it.
Construct an angle PQR = 80∘. Draw a line parallel to PQ at a distance of 3 cm from it and another line parallel to QR at a distance of 3.5 cm from it. Mark the point of intersection of these parallel lines as A.
Draw the perpendicular bisector of a line segment of length 7 cm and also find and mark the midpoint. [2 MARKS]
Write correct sequence of the following steps to draw perpendicular bisector of a line AB.
a. Join XY to cut AB at O. XY is called the perpendicular bisector of AB.
b. To construct the perpendicular bisector of the line segment AB, we first take A and
then B as centre and radius greater than half of AB.
c. Draw arcs above and below AB such that the arcs cut each other at X and Y.
a, b, c
b, a, c
b, c, a
c, a, b
Find the ratio in which D divides side BC if Ar(ΔABD)Ar(ΔADC)=23
43
√23
1
23
Mention the proper order of identifying a point D on BC such that Ar(△ABD)Ar(△ADC)=23.
1) Join B5C and draw a line parallel to B5C from B2.
2) Identify the ratio in which the point D divides BC using the relation given.
3) Mark 5 points B1, B2, B3, B4 and B5 on BX such that they are equidistant.
4) Construct a ray BX which makes an acute angle with line segment BC.
5) The point of intersection of the parallel line from B2 with BC is the point D.
2, 4, 3, 1, 5
1, 2, 4, 3, 5
4, 3, 2, 5, 1
3, 5, 2, 4, 1
Find the ratio in which D divides side BC if Ar(ΔABD)Ar(ΔADC)=23.
√23
23
1
43