Question
Draw a line l. Take a point A, not lying on l. Draw a line m such that $\text{m}\perp\text{l}$ and passing through A. Using ruler and a set-square.
✓
Answer
We draw a line L and take a point A outside it.
Place a set square PQR such that its one arm PQ of the right angle is along the line L.
Without disturbing the position of set-square, place a ruler along its edge PR.
Now, without disturbing the position of the ruler, slide the set-square along the ruler until its arm QR reaches point A.
Without disturbing the position of the set-square, draw a line m.
Line m is the required line perpendicular to line L.
Place a set square PQR such that its one arm PQ of the right angle is along the line L.
Without disturbing the position of set-square, place a ruler along its edge PR.
Now, without disturbing the position of the ruler, slide the set-square along the ruler until its arm QR reaches point A.
Without disturbing the position of the set-square, draw a line m.
Line m is the required line perpendicular to line L.
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The following are the details or the number of students in a class of 30 students in a class of 30 students present during a week.
Represent the above data by a pictograph.
|
Day
|
Number of students present
|
|
Monday
|
24
|
|
Tuesday
|
20
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|
Wednesday
|
28
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|
Thursday
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30
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Friday
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26
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Saturday
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22
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Give the correct matching of the statements of Column A and Column B.
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No.
|
Column A
|
|
Column B
|
|
i
|
Points are collinear.
|
a.
|
May be parallel or intersecting.
|
|
ii
|
Line is completely known.
|
b.
|
Are undefined terms in geometry.
|
|
iii
|
Two lines in a plane.
|
c.
|
If they lie on the same line.
|
|
iv
|
Relations between points and lines.
|
d.
|
Can pall through a point.
|
|
v
|
Three non-collinear points.
|
e.
|
Determine a plane.
|
|
vi
|
A plane extends.
|
f.
|
Are called incidence porperties.
|
|
vii
|
Indefinite number of lines.
|
g.
|
It two points are givne.
|
|
viii
|
Point, line and plane are.
|
h.
|
Indefinitely in all directions.
|
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i. $7 \frac{2}{5}$
ii. $5 \frac{1}{6}$
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→i. $7 \frac{2}{5}$
ii. $5 \frac{1}{6}$
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v. $1 \frac{5}{7}$
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