Question

the value of x if, 2x , x and 90 are the three interior angles of a triangle is:
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Answer 1

Sum of interior of angles = 180°

According to the question :-

2x + x + 90° = 180°

3x + 90° = 180°

3x = 180° - 90°

3x = 90°

x = 90°/3

x = 30°

So , the first angle is of 30 × 2= 60°

second angle is of 30°

and the third angle is of 90°

Answer 2

Answer: 30°

Step by step explanation:

We know that; thee sum of the three angles of a triangle is 180°;  

              x+2x+90=180        

             = 3x+90=180  

             = 3x=180-90     90 transposed to RHS

             = 3x=90

             = x= 90/3            3 transposed to RHS

           

 

Note:- On transposing a term to the opposite side, adddition becomes subtraction and vice-versa and multiplication becomes division and vice-versa    

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Hope it helps,

REGARDS