The given angles in the triangle are :
A = (2x+3)°
B=(5x)°
C = (10x)°
To find the measure of angle B , first we need to find the value of x
The value of x can be found out by equating the sum of three angles to 180°
=> (2x+3)° + 5x° + 10x° = 180
=> 17x + 3 = 180°
=> 17x = 180-3
=> 17 x = 177
=> x =
=> x = 10.4°
Angle B = 5x = 5(10.4) = 52° is the required measure of B