Question 15 Marks
Which of the following are polygons? 
Answer
View full question & answer→$a.\ $It is formed by four line segments and we know that a simple closed figure formed by three or more line segments is called a polygon. So, it is a polygon named quadrilateral.
$b.\ $It is formed by three line segments and we know that a simple closed figure formed by three or more line segments is called a polygon. So, it is polygon named triangle.
$c.\ $It is formed by twelve line segments and we know that a simple closed figure formed by three or more line segments is called a polygon. So, it is polygon.
$d.\ $It is not a polygon because it contains curves.
$b.\ $It is formed by three line segments and we know that a simple closed figure formed by three or more line segments is called a polygon. So, it is polygon named triangle.
$c.\ $It is formed by twelve line segments and we know that a simple closed figure formed by three or more line segments is called a polygon. So, it is polygon.
$d.\ $It is not a polygon because it contains curves.