Find the measure of each exterior angle of each regular polygon. \( \begin{array}{ll}\text { 10. quadrilateral } & \text { 11. octagon }\end{array} \)

To find the measure of each exterior angle of a regular polygon, you can use the formula: \( \text{Exterior Angle} = \frac{360°}{n} \), where \( n \) is the number of sides of the polygon. For a quadrilateral (which has 4 sides): \( \text{Exterior Angle} = \frac{360°}{4} = 90° \) For an octagon (which has 8 sides): \( \text{Exterior Angle} = \frac{360°}{8} = 45° \) So, each exterior angle of a quadrilateral measures 90 degrees, and each exterior angle of an octagon measures 45 degrees!