Question

6. Find the value of x
(i)Straight line​

Answer 1

Since it's a straight line we can say that 5x° + 4x° are a linear pair

(linear pair are those angles which add up to 180° supplementary angles)

so,

5x + 4x = 180

9x = 180

x = 180/9

x = 20

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Answer 2

Answer:

x=20°

Step-by-step explanation:

5x+4x= 180° .....(angles in linear pair)

9x=180

x=180/9

x=20°

Ans: The value of X is 20°