Mathematics

Which of the following is not an obtuse angle ?

$\displaystyle { 182 }^{ o }$

SOLUTION
Obtuse angle lies between $\displaystyle { 90 }^{ o }$ to $\displaystyle { 180 }^{ o }$ and $\displaystyle { 182 }^{ o }$ is a reflex angle, so it is not a obtuse angle.
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 $\displaystyle {360 }^{ o }$. You're just one step away

Single Correct Medium Published on 09th 09, 2020
Questions 120418
Subjects 10
Chapters 88
Enrolled Students 86

Realted Questions

Q1 Subjective Medium
Two complementary angles differ by $10^{o}$. Find the angles

Asked in: Mathematics - Lines and Angles

1 Verified Answer | Published on 09th 09, 2020

Q2 One Word Medium
In Fig., $\angle AOF$ and $\angle FOG$ form a linear pair. If $\angle EOB = \angle FOC = 90^{\circ}$ and $\angle DOC =\angle AOB = 30^{\circ}.$
How many right angles in the above figure?

Asked in: Mathematics - Lines and Angles

1 Verified Answer | Published on 09th 09, 2020

Q3 Subjective Medium
One of the angles forming a linear pair is a right angle. What can you say about its other angle?

Asked in: Mathematics - Lines and Angles

1 Verified Answer | Published on 09th 09, 2020

Q4 Single Correct Medium
In the figure, $ABCD$ is a trapezium in which $AB\parallel DC$ and $AB=2DC$. Determine the ratio of the areas of $\triangle AOB$ and $\triangle COD$.
• A. $4:3$
• B. $8:1$
• C. $5:1$
• D. $4:1$

Where will the hour hand of a clock stop if it starts from $8$ and turns through $2$ right angles?