Tag: identifying angles

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

Which of the following is obtuse angle?

  1. Two right angles

  2. One and half right angles

  3. One right angle

  4. Half a right angle
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Right angle $=90^{\circ}$

One and half right angle $=\dfrac { { 90 }^{ \circ  } }{ 2 } +{ 90 }^{ \circ  }={ 135 }^{ \circ  }$
which is greater than $90^{\circ}$
So it is an obtuse angle .
Option $B$ is correct.

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

Range of an obtuse angle is:

  1. $[0˚, 90˚)$
  2. $(0˚, 90˚]$
  3. $[90˚, 180˚)$
  4. $(90˚, 180˚)$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Acute angle is the angle which is greater than $\displaystyle { 0 }^{ o }$ and less than $\displaystyle { 90 }^{ o }$.

Obtuse angle is the angle which is greater than $\displaystyle { 90}^{ o }$ and less than $\displaystyle {180 }^{ o }$.
Right angle is the angle which is equal to $90^o$.
Reflex angle is the angle which is greater than $\displaystyle {180}^{ o }$ and less than $\displaystyle {360 }^{ o }$.

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

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

  1. obtuse

  2. acute

  3. right

  4. none
Reveal answer Fill a bubble to check yourself
B Correct answer
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.