Question
Use a pair of compasses and construct the following angles:
45°
45°
✓
Answer
Steps of Construction:
- Draw a ray OA.
- With O as centre and any su itable radius draw an arc above OA to cut it at B.
- With B as centre and same radius cut the previous arc at C and then with C as centre and same radius cut the arc at D.
- With C as centre and radius more than half CD, draw an arc.
- With D as centre and same radius draw another arc to cut the previous arc at E.
- Join OE. Then $\angle\text{AOE}=90^\circ.$
- Draw the bisector OF of angle $\angle\text{AOE}.$
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Express each of the following as a Roman numeral:
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S.No.
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Numerical
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i
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2
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ii
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8
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iii
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14
|
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iv
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29
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v
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36
|
|
vi
|
43
|
|
vii
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54
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|
viii
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61
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ix
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73
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x
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81
|
|
xi
|
91
|
|
xii
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95
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xiii
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99
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xiv
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105
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xv
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114
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i. $3 \frac{1}{3}-1 \frac{1}{4}$
ii. $5 \frac{1}{2}-3 \frac{1}{3}$
iii. $7 \frac{1}{8}-6 \frac{1}{10}$
iv. $7 \frac{1}{2}-3 \frac{1}{5}$
→ii. $5 \frac{1}{2}-3 \frac{1}{3}$
iii. $7 \frac{1}{8}-6 \frac{1}{10}$
iv. $7 \frac{1}{2}-3 \frac{1}{5}$
Round off each of the following numbers to nearest tens, hundreds and thousands:
- 964
- 1049
- 45,634
- 79,085
Draw a line AB. Take a point P outside it. Draw a line passing through P and parallel to AB.
How to do this subtraction:$4 \frac{1}{4}-2 \frac{1}{2} ?$Is it same as$\left[4-2+\frac{1}{4}-\frac{1}{2}\right] ?$
→Study the bar graph representing the number of persons in various age groups in a town shown in Observe the bar graph and answer the following questions:
- What if the percentage of the youngest age-group persons over those in the oldest age group?
- What is the total population of the town?
- What is the number of persons in the age-group 60-65?
- How many persons are more in the age-group 10-15 than in the age group 30-35?
- What is the age-group of exactiy 1200 persons living in the town?
- What is the total number of persons living in the town in the age-group 50-55?
- What is the total muner of persons living in the town in the age-groups 10-15 and 60-65?
- Whether the population in general increases, decreases or remains constant with the increase in the age-group.
Use a pair of compasses and construct the following angles:
$22\frac{1}{2}^\circ$
→$22\frac{1}{2}^\circ$
The pictograph shown different subject books which are kept in a library.
- How many English books are there in the library?
- How many maths books are there?
- Which books are maxmimum in number?
- Which books are minimum in number?
Draw a line segment AB = 5.6cm. Draw the perpendicular bisector of AB.
$3 \frac{1}{5}+2 \frac{1}{3}$
→