Sum of interior anglesS = (n -2)180
S = (3-2)180
S = (1)180
S = 180
Value of x
x = 180 - [89 + 42]
x = 180 - [131]
x = 49
X=49°
42°+x+89°=180°
42°+49°+89°=180°
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Sum of interior angles
S = (n -2)180
S = (3-2)180
S = (1)180
S = 180
Value of x
x = 180 - [89 + 42]
x = 180 - [131]
x = 49
X=49°
42°+x+89°=180°
42°+49°+89°=180°