Question

what is the measurement of angle A,

Answer 1

where is the angle ???
generally angle measured in radian or degree

Answer 2

angle A is (x-1) angle b is (2x+1) angle C is 3x

Answer 3

its not clearly visible

Answer 4

but i think these are the angle inside a triangle

Answer 5

and the sum of the angle of triangle =180
so
x-1+2x+1+3x=180

Answer 6

6x=180
x=30

Answer 7

now put value of x in angle in place of x and calculate