In this question, angle 5 and angle 2 are linear pair. And angles of linear pair are supplementary angles .
Therefore
And sum of interior angles of a triangle is 180 degree, that is
SInce both the equations have 180 in the right side, left side of both equations are equal too . That is
Which gives
So the correct option is A .
Absolute value is defined as the distance of a number from zero on a number line.
Since, the distance can never be negative, hence, absolute value can never be negative.
For example 1 is 1 away from the origin and -1 is also, 1 away from the origin.
Therefore, absolute value of both -1 and 1 is 1. Mathematically, we can write
|-1| =1
|1|=1
Therefore, the number 1 and -1 on the number line have an absolute value of 1.
The attached image represents the interval 2 < x ≤ 9 on the number line
<h3>How to highlight the interval?</h3>The interval is given as:
2 < x ≤ 9
The above interval means that:
In inequality, the < symbol uses an open circle, while the ≤ uses a closed circle
Next, we highlight the interval using the above rules (see attachment)
Read more about inequality at:
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