<Li> Concave . Non-convex and simple . There is at least one interior angle greater than 180 ° . </Li>
<Li> Concave . Non-convex and simple . There is at least one interior angle greater than 180 ° . </Li>
a polygon in which one or more interior angle has a measure greater than 180
a polygon in which one or more interior angle has a measure greater than 180
Concave
Concave