8,10,12:b okok please answerthese

Dear Student,

Please find the below required solution of Q-10.

Given that the ratio of triangle is 1:2:3
So assume that first angle = x
                   Second angle = 2x
                 And third angle = 3x
So x+2x+3x = 180^o                   [ sum of all angle of triangle is 180^o ]
=> 6x = 180^o
=> x= 30^o

Hence first angle = x = 30^o
Second angle = 2x = 2 x 30^{o =} 60^o
And third angle = 3 x 30^o =90^o

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