Given:
The measurement of the angles of a triangle are 3b,2b,and 4b.
To find:
The smallest angle.
Solution:
According to the angle sum property, the sum of all angles of a triangle is 180 degrees.
[Angle sum property]
![9b=180^(\circ)](https://img.qammunity.org/2021/formulas/mathematics/high-school/d3fqatxnwmffi9ffic9qe73oxgymq4xhr1.png)
Divide both sides by 9.
![b=20^(\circ)](https://img.qammunity.org/2021/formulas/mathematics/high-school/s7vm6ghelphbb0e2d1o6jyfyhodhfokptc.png)
Now,
![3b=3(20^(\circ))=60^(\circ)](https://img.qammunity.org/2021/formulas/mathematics/high-school/zio9c4h5jlqqx4q5vp5e7saybrkfegrase.png)
![2b=2(20^(\circ))=40^(\circ)](https://img.qammunity.org/2021/formulas/mathematics/high-school/xozgqkwd7stnqlkeq5kbwk2q4snnqlw4ws.png)
![3b=4(20^(\circ))=80^(\circ)](https://img.qammunity.org/2021/formulas/mathematics/high-school/7wbvsd58oxij3sshah4m4kpolwgbmaxt5h.png)
Therefore, the smallest angle is 40 degrees.