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37 votes
Find the value of x in the diagram below

Find the value of x in the diagram below-example-1
User Interjay
by
2.4k points

2 Answers

15 votes
15 votes

The angles marked in the given diagram are forming a linear pair of angles, Which means that their sum will be 180°...~

  • ∠1 = 13x+6
  • ∠2 = 29x+6


\colorbox{lightyellow}{(13x + 6) + (29x + 6) = 180 \degree}

Solve the equation for x ~


\rm \: 42x + 12 = 180


\rm \: 42x = 180 - 12


\rm \: 42x = 168


\rm \: 42x / 42 = 168 / 42


\rm \: x = 4

Now,


\large{|\underline{\mathtt{\red{1}\blue{ ^(st) }\orange{ \: }\pink{a}\blue{n}\purple{g}\green{l}\red{e}\orange{ \curvearrowright}}}}


\sf \: 13x + 6 \\ \sf \: 13 * 4 + 6 \\ \sf \: ∠1 = 58 \degree


\large{|\underline{\mathtt{\red{2}\blue{ ^(nd) }\orange{ \: }\pink{a}\blue{n}\purple{g}\green{l}\red{e}\orange{ \curvearrowright}}}}


\sf \: 29x + 6 \\ \sf \: 29 * 4 + 6 \\ \sf \: ∠2 = 122 \degree

User Akpp
by
3.3k points
11 votes
11 votes


\qquad \qquad\huge \underline{\boxed{\sf Answer}}

In the given diagram, The shown angles form Linear pair. And according to that property the sum of measures of the two Angles equals to 180°

Now, let's use the equation to solve for x ~


\qquad \sf  \dashrightarrow \:( 13x + 6) + (29x + 6) = 180 \degree


\qquad \sf  \dashrightarrow \: 13x + 6 + 29x + 6= 180 \degree


\qquad \sf  \dashrightarrow \: 13x + 29x + 6 + 6= 180 \degree


\qquad \sf  \dashrightarrow \: 42x + 12= 180 \degree


\qquad \sf  \dashrightarrow \: 42x = 180 \degree - 12 \degree


\qquad \sf  \dashrightarrow \: 42x = 168 \degree


\qquad \sf  \dashrightarrow \: x = 168 \degree / 42


\qquad \sf  \dashrightarrow \: x = 4 \degree


\fbox \colorbox{black}{ \colorbox{white}{x} \:  \:  \:   \:  \:  \:  \: \: \colorbox{white}{=}  \:  \:  \:  \:  \:   + \colorbox{white}{4 \degree}}

User Adrian Hofman
by
2.8k points
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