Find the measure of each exterior angle of each regular polygon. 10. quadrilateral 11. octagon

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1. For a regular quadrilateral (4 sides):  
   - The measure of each exterior angle is given by  
     $$
     \theta = \frac{360^\circ}{n}
     $$  
   - Substitute $$ n = 4 $$:  
     $$
     \theta = \frac{360^\circ}{4} = 90^\circ
     $$

2. For a regular octagon (8 sides):  
   - Using the same formula,  
     $$
     \theta = \frac{360^\circ}{n}
     $$  
   - Substitute $$ n = 8 $$:  
     $$
     \theta = \frac{360^\circ}{8} = 45^\circ
     $$
Each exterior angle of a regular quadrilateral is 90 degrees, and each exterior angle of a regular octagon is 45 degrees.

Find the measure of each exterior angle of each regular polygon. 10. quadrilateral 11. octagon

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