If you were to compute this, Angle C should be equal to 100°.
In a triangle, all angles sum up to 180°. 
In triangle ABC, where the m∠A =30° and m∠50°:
m∠A + m∠B + m∠C = 180°
30° + 50 + m∠C = 180°
80° + m∠C = 180°
m∠C = 180° - 80°
m∠C = 100°
The triangle should look like the picture attached. 
 
        
             
        
        
        
Aerobic releases the most energy
        
             
        
        
        
Explanation:
 it consists of mouth, pharynx, gullet, stomach, small intestine, large intestine, appendix, colon, rectum, and anus. 
All these parts are found in most vertebrates