ANSWER
The total angle measure of 4 parts is 180°
EXPLANATION
The complete circle measures 360°.
If the circle is divided into 8 equal parts, then 8 equal sectors will be formed.
Each sectoral angle measures
[tex] \frac{360 \degree}{8} = 45 \degree[/tex]
Therefore the total angle measure of 4 parts is 4(45°)=180°
