Tag: types of angle

Questions Related to types of angle

Mark the correct alternative of the following.
An angle of measure $180^o$ is called?

maths construction of angles identifying angles acute and obtuse angles types of angle

  1. A zero angle

  2. A right angle

  3. A straight angle

  4. A reflex angle

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Correct Option: C
Explanation:

An angle of measure $180^o$ is called a straight  angle. [ Using definition of the straight angle]

Angle formed by straight angle is _____ .

maths construction of angles identifying angles acute and obtuse angles types of angle

  1. $90^{\circ}$

  2. $180^{\circ}$

  3. $60^{\circ}$

  4. $45^{\circ}$

Show answer
Correct Option: B
Explanation:

Angle formed by straight angle $=180^o$

Measure of an obtuse angle is

maths construction of angles identifying angles acute and obtuse angles types of angle

  1. $>\, 0^{\circ},\, <\, 90^{\circ}$

  2. $>\, 90^{\circ},\, <\, 180^{\circ}$

  3. $>\, 0^{\circ},\, <\, 270^{\circ}$

  4. $>\, 0^{\circ},\, <\, 180^{\circ}$

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Correct Option: B
Explanation:

Measure of obtuse angle

$90^o<x<180^o [>90^o, < 180^o]$

An angle which measures more than $\displaystyle 0^{o}$ and less than $\displaystyle 90^{o}$ is called:

maths construction of angles identifying angles acute and obtuse angles types of angle

  1. obtuse

  2. acute

  3. right

  4. none

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Correct Option: B
Explanation:

An angle which measure more than $0^o$ and less than $90^o$ is an acute angle.

An angle which measure more than $90^o$ and less than $180^o$ is an obtuse angle.
Hence, the answer is acute.

 $\displaystyle 89^{o}$ is an example of:

maths construction of angles identifying angles acute and obtuse angles types of angle

  1. obtuse angle

  2. acute angle

  3. right angle

  4. None of the above

Show answer
Correct Option: B
Explanation:
An angle with measure $=90^{o}$ is a right angle
An angle with measure $>90^{o}$ is an obtuse angle
An angle with measure $<90^{o}$ is an acute angle

Here, $89^o$ is less than $90^o$. 

Hence, it is an acute angle.

Straight angle measures _____.

maths construction of angles identifying angles acute and obtuse angles types of angle

  1. $\displaystyle 90^{o} $

  2. $\displaystyle 180^{o} $

  3. $\displaystyle 60^{o} $

  4. $\displaystyle 45^{o} $

Show answer
Correct Option: B
Explanation:

An straight angle always makes an angle of $ 180^o $.

Hence, the answer is $180^{o}$.

$\displaystyle 179^{o}$ is an example of:

maths construction of angles identifying angles acute and obtuse angles types of angle

  1. obtuse angle 

  2. acute angle

  3. right angle

  4. None of the above

Show answer
Correct Option: A
Explanation:
An angle with measure $=90^{o}$ is a right angle
An angle with measure $>90^{o}$ is an obtuse angle
An angle with measure $<90^{o}$ is an acute angle

Here, $179^o$ is greater than $90^o$ and less than $180^{o}$. 

Hence, it is an obtuse angle.

An angle which measures $\displaystyle 180^{o}$ is called:

maths construction of angles identifying angles acute and obtuse angles types of angle

  1. zero angle

  2. right angle

  3. straight angle

  4. acute angle

Show answer
Correct Option: C
Explanation:

An angle which measure $0^0$ is called zero angle.

An angle which measure more than $0^o$ and less than $90^o$ is an acute angle.
An angle which measures $90^o$ is called a right angle.

An angle which measure more than $90^o$ and less than $180^o$ is an obtuse angle.
An straight line makes the angle of $180^o$.
Hence, the answer is straight angle.

Two triangles are similar, if their corresponding angles are ________.

maths complementary angle, supplementary angles and adjcent angles acute and obtuse angles types of angle measurement of an angle

  1. Proportional

  2. Equal

  3. A & B

  4. None of the above

Show answer
Correct Option: B
Explanation:

Two triangles are similar, if their corresponding angles are equal.

(Two triangles are similar, if their corresponding angles are equal and corresponding sides are proportional.)