45° 3x + 9° find the value of x
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Step-by-step explanation:
Sum of angles in a ∆ is equal to 180°
- 45° + 3x + 9° = 180°
- 54° + 3x = 180°
- 3x = 180° - 54°
- 3x = 126°
- x =
- x = 42°
P R O O F :-
LHS = 45° + 3x + 9°
RHS = 180°
- 45° + 3(42) + 9°
- 45° + 126° + 9°
- 180°
Therefore, LHS = RHS
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