Question 11 Mark
State the kind of angle, in each case, formed between the following directions: North and North-East
Answer
View full question & answer→North and north-east directions form an angle of $45^\circ $, which is an acute angle.
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Question 21 Mark
Classify the following angles as acute, obtuse, straight, right, zero and complete angle: $145^\circ $
Answer
View full question & answer→An acute angle measures between $0^\circ $ and $90^\circ .$
An obtuse angle measures between $90^\circ $ and $180^\circ .$
A straight angle measures $180^\circ .$
A right angle measures $90^\circ .$
A zero angle measures $0^\circ $ and a complete angle measures $360^\circ .$
$145^\circ $ is an obtuse angle.
An obtuse angle measures between $90^\circ $ and $180^\circ .$
A straight angle measures $180^\circ .$
A right angle measures $90^\circ .$
A zero angle measures $0^\circ $ and a complete angle measures $360^\circ .$
$145^\circ $ is an obtuse angle.
Question 31 Mark
State the kind of the following angles: 
Answer
View full question & answer→Complete angle, as it is equal to $360^\circ .$
Question 41 Mark
Classify the following angles as acute, obtuse, straight, right, zero and complete angle: $30^\circ $
Answer
View full question & answer→An acute angle measures between $0^\circ $ and $90^\circ $.
An obtuse angle measures between $90^\circ $ and $180^\circ .$
A straight angle measures $180^\circ .$
A right angle measures $90^\circ .$
A zero angle measures $0^\circ $ and a complete angle measures $360^\circ .30^\circ $ is an acute angle.
An obtuse angle measures between $90^\circ $ and $180^\circ .$
A straight angle measures $180^\circ .$
A right angle measures $90^\circ .$
A zero angle measures $0^\circ $ and a complete angle measures $360^\circ .30^\circ $ is an acute angle.
Question 51 Mark
State the kind of the following angles: 
Answer
View full question & answer→Acute angle, as it measures between $0^\circ $ and $90^\circ .$
Question 61 Mark
State the kind of the following angles: 
Answer
View full question & answer→Right angle, as it is equal to $90^\circ .$
Question 71 Mark
Classify the following angles as acute, obtuse, straight, right, zero and complete angle: $179^\circ $
Answer
View full question & answer→An acute angle measures between $0^\circ $ and $90^\circ $. An obtuse angle measures between $90^\circ $ and $180^\circ $. A straight angle measures $180^\circ $. A right angle measures $90^\circ $. A zero angle measures $0^\circ $ and a complete angle measures $360^\circ . 179^\circ $ is an obtuse angle.
Question 81 Mark
Which of the following statements are true:
$i.\ $The vertex of an angle lies in its interior.
$ii.\ $The vertex of an angle lies in its exterior.
$iii.\ $The vertex of an angle lies on it.
$i.\ $The vertex of an angle lies in its interior.
$ii.\ $The vertex of an angle lies in its exterior.
$iii.\ $The vertex of an angle lies on it.
Answer
View full question & answer→This is the only correct statement.
Question 91 Mark
An angle is formed by two adjacent fingers. What kind of angle will it appear?
Answer
View full question & answer→Angle formed by two adjacent fingers will appear as an acute angle.
Question 101 Mark
Classify the following angles as acute, obtuse, straight, right, zero and complete angle: $75^\circ $
Answer
View full question & answer→An acute angle measures between $0^{\circ}$ and $90^{\circ}$. An obtuse angle measures between $90^{\circ}$ and $180^{\circ}$. A straight angle measures $180^{\circ}$. A right angle measures $90^{\circ}$. A zero angle measures $0^{\circ}$ and a complete angle measures $360^{\circ} .75^{\circ}$ is an acute angle.
Question 111 Mark
By using tracing paper compare the angles in the pairs given in Fig. 
Answer
View full question & answer→Using tracing paper, we get that: $\angle\text{UVW}$ is greater than $\angle\text{LMN}.$
Question 121 Mark
Classify the following angles as acute, obtuse, straight, right, zero and complete angle: $90.5^{\circ}$
Answer
View full question & answer→An acute angle measures between $0^{\circ}$ and $90^{\circ}$. An obtuse angle measures between $90^{\circ}$ and $180^{\circ}$. A straight angle measures $180^{\circ}$. A right angle measures $90^{\circ}$. A zero angle measures $0^{\circ}$ and a complete angle measures $360^{\circ} .90 .5^{\circ}$ is an obtuse angle.
Question 131 Mark
Classify the following angles as acute, obtuse, straight, right, zero and complete angle:
$89.5^\circ $
$89.5^\circ $
Answer
View full question & answer→An acute angle measures between $0^{\circ}$ and $90^{\circ}$. An obtuse angle measures between $90^{\circ}$ and $180^{\circ}$. A straight angle measures $180^{\circ}$. A right angle measures $90^{\circ}$. A zero angle measures $0^{\circ}$ and a complete angle measures $360^{\circ}$. $89.5^{\circ}$ is an acute angle.
Question 141 Mark
Write the arms and the vertex of $\angle\text{LMP}$ given in Figure: 
Answer
View full question & answer→Arms of $\angle\text{LMP}$ are $MP$ and $ML$. Further, vertex is $M.$
Question 151 Mark
Classify the following angles as acute, obtuse, straight, right, zero and complete angle: $360^\circ $
Answer
View full question & answer→An acute angle measures between $0^{\circ}$ and $90^{\circ}$. An obtuse angle measures between $90^{\circ}$ and $180^{\circ}$. A straight angle measures $180^{\circ}$. A right angle measures $90^{\circ}$. A zero angle measures $0^{\circ}$ and a complete angle measures $360^{\circ}$. $360^{\circ}$ is a complete angle.
Question 161 Mark
Classify the following angles as acute, obtuse, straight, right, zero and complete angle:
$165^\circ$
$165^\circ$
Answer
View full question & answer→An acute angle measures between $0^{\circ}$ and $90^{\circ}$. An obtuse angle measures between $90^{\circ}$ and $180^{\circ}$. A straight angle measures $180^{\circ}$. A right angle measures $90^{\circ}$. A zero angle measures $0^{\circ}$ and a complete angle measures $360^{\circ}$. $165^{\circ}$ is an obtuse angle.
Question 171 Mark
By simply looking at the pair of angles given in Figure, state which of the angles in the pairs is greater: 
Answer
View full question & answer→$\angle\text{PQR}$ is greater than $\angle\text{LMN}.$
Question 181 Mark
State the kind of angle, in each case, formed between the following directions: East and North
Answer
View full question & answer→East and North directions form an angle of 90°, which is a right angle.
Question 191 Mark
Classify the following angles as acute, obtuse, straight, right, zero and complete angle: $0^\circ $
Answer
View full question & answer→An acute angle measures between $0^{\circ}$ and $90^{\circ}$. An obtuse angle measures between $90^{\circ}$ and $180^{\circ}$. A straight angle measures $180^{\circ}$. A right angle measures $90^{\circ}$. A zero angle measures $0^{\circ}$ and a complete angle measures $360^{\circ} .0^{\circ}$ is a zero angle.
Question 201 Mark
Classify the following angles as acute, obtuse, straight, right, zero and complete angle:
$118^\circ $
$118^\circ $
Answer
View full question & answer→An acute angle measures between $0^\circ $ and $90^\circ $. An obtuse angle measures between $90^\circ $ and $180^\circ $. A straight angle measures $180^\circ $. A right angle measures $90^\circ $. A zero angle measures $0^\circ$ and a complete angle measures $360^\circ .$
$118^\circ $ is an obtuse angle.
$118^\circ $ is an obtuse angle.
Question 211 Mark
State the kind of the following angles:
Answer
View full question & answer→Straight angle, as it is equal to $180^\circ .$
Question 221 Mark
State the kind of angle, in each case, formed between the following directions:
East and West
East and West
Answer
View full question & answer→East and west directions form an angle of $180^\circ $, which is a straight angle.
Question 231 Mark
By using tracing paper compare the angles in the pairs given in Fig. 
Answer
View full question & answer→Using tracing paper, we get that: $\angle\text{PQR}$ is greater than $\angle\text{AOB}.$
Question 241 Mark
Classify the following angles as acute, obtuse, straight, right, zero and complete angle:
$90^\circ $
$90^\circ $
Answer
View full question & answer→An acute angle measures between $0^{\circ}$ and $90^{\circ}$. An obtuse angle measures between $90^{\circ}$ and $180^{\circ}$. A straight angle measures $180^{\circ}$. A right angle measures $90^{\circ}$. A zero angle measures $0^{\circ}$ and a complete angle measures $360^{\circ}$. $90^{\circ}$ is a right angle.
Question 251 Mark
Classify the following angles as acute, obtuse, straight, right, zero and complete angle:
$180^\circ $
$180^\circ $
Answer
View full question & answer→An acute angle measures between $0^{\circ}$ and $90^{\circ}$. An obtuse angle measures between $90^{\circ}$ and $180^{\circ}$. A straight angle measures $180^{\circ}$. A right angle measures $90^{\circ}$. A zero angle measures $0^{\circ}$ and a complete angle measures $360^{\circ}$. $180^{\circ}$ is a straight angle.
Question 261 Mark
By simply looking at the pair of angles given in Figure, state which of the angles in the pairs is greater: 
Answer
View full question & answer→$\angle\text{UVW}$ is greater than $\angle\text{XYZ}.$
Question 271 Mark
By using tracing paper compare the angles in the pairs given in Fig. 
Answer
View full question & answer→Using tracing paper, we get that: $\angle\text{PQR}$ is greater than $\angle\text{EFG}.$
Question 281 Mark
State the kind of angle, in each case, formed between the following directions: North and South-East
Answer
View full question & answer→North and south-east directions form an angle of $135^\circ $, which is an obtuse angle.
Question 291 Mark
Classify the following angles as acute, obtuse, straight, right, zero and complete angle:$ 29^\circ $
Answer
View full question & answer→An acute angle measures between $0^{\circ}$ and $90^{\circ}$. An obtuse angle measures between $90^{\circ}$ and $180^{\circ}$. A straight angle measures $180^{\circ}$. A right angle measures $90^{\circ}$. A zero angle measures $0^{\circ}$ and a complete angle measures $360^{\circ} .29^{\circ}$ is an acute angle.
Question 301 Mark
State the kind of the following angles: 
Answer
View full question & answer→Obtuse angle, as it measures between $90^\circ $ and $180^\circ .$
Question 311 Mark
By simply looking at the pair of angles given in Figure, state which of the angles in the pairs is greater: 
Answer
View full question & answer→$\angle\text{AOB}$ is greater than $\angle\text{DEF}.$
Question 321 Mark
By using tracing paper compare the angles in the pairs given in Fig. 
Answer
View full question & answer→Using tracing paper, we get that: $\angle\text{RST}$ is greater than $\angle\text{XYZ}.$