Find the value of x , if the mean of 122, 240, x+10, 162,122,210 is 218.
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Given : two triangle
To find : value of x
( i ) Sum of interior angles of a triangles is always 180°
Hence 2x + 3x + x = 180°
6x = 180°
x = 30°
( ii ) Here x + 10 + 3x + x + 20 = 180°
5x + 30 = 180°
x = 30°
Hence ( I ) x = 30° , ( ii ) x =30°
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