6.1 Polygon

In this section you've learned how to identify the different polygons and how to find the measures of interior angles of a quadrilateral. Here are some examples:


A. Tell whether the figure is a polygon.

1.

Solution: Yes, it is a polygon because it's a closed figure that has 3 or more sides connecting at the vertices.



2.


Solution: No, it is not a polygon because it is not a closed figure.




B. Tell whether the polygon is regular or irregular.

Solution: It is a regular because all of the sides are congruent and all of the angles are congruent.



C. Find the value of x in the quadrilateral.

Solution:
x+ 92+ 111+ 73 = 360
x+ 276 = 360
x = 84





Now let's test your knowledge :)
Try these problems on your own.


A. Tell whether the figure is a polygon.

1.

2.





B. Tell whether the polygon is regular or irregular.



C. Find the value of x in the figure.