Mathematics

# Find the value of unknown x in the following diagram.

##### SOLUTION
Sum of interior angle of a $\Delta le$ is $180^o$
$\angle P + \angle Q + \angle R = 180^o$
$2x + x + 90^o = 180^o$
$3x = 90^o$
$\therefore x = 30^o$

You're just one step away

Subjective Medium Published on 09th 09, 2020
Questions 120431
Subjects 10
Chapters 88
Enrolled Students 151

#### Realted Questions

Q1 TRUE/FALSE Medium
In the figure $\angle P + \angle Q + \angle R + \angle S + \angle T = 2$ right angles
• A. True
• B. False

Asked in: Mathematics - Lines and Angles

1 Verified Answer | Published on 09th 09, 2020

Q2 Single Correct Medium
Find x; if $\angle\, 1\, =\, 5x\, +\, 15^{\circ}$ and $\angle\, 2\, =\, 28x$, angles form linear pair.
• A. $40^{\circ}$
• B. $140^{\circ}$
• C. $5^{\circ}$
• D. $20^{\circ}$

Asked in: Mathematics - Lines and Angles

1 Verified Answer | Published on 09th 09, 2020

Q3 Single Correct Medium
In fig. lines AB and CD intersects each other at O. If $\displaystyle \angle AOC={ 30 }^{ o }$, find $\displaystyle \angle BOD$.
• A. $\displaystyle { 30 }^{ o }$
• B. $\displaystyle { 150 }^{ o }$
• C. $\displaystyle { 60 }^{ o }$
• D. $\displaystyle { 75 }^{ o }$

Asked in: Mathematics - Lines and Angles

1 Verified Answer | Published on 09th 09, 2020

Q4 Passage Medium
$D$ and $E$ are points on the sides $AB$ and $AC$ respectively of $\triangle ABC$. For the following case, state whether $DE\parallel BC$:

Asked in: Mathematics - Lines and Angles

1 Verified Answer | Published on 09th 09, 2020

Q5 Single Correct Medium
In. triangle ABC,$\angle A$ + $\angle B$ = 144 and$\angle A$ + $\angle C$ = 124.
Calculate smallest angle of the triangle.
• A. $36^o$
• B. $56^o$
• C. $46^o$
• D. none of these

Asked in: Mathematics - Lines and Angles

1 Verified Answer | Published on 09th 09, 2020