$$\perp$$   this is a symbol for (a)   lines.

This is a (a)   triangle.

This is a ...

(a)  

If angle a + $$47\degree$$   make a straight angle. What is the measurement of angle a?

(a)  

A shape with only one pair of parallel side is called (a)  

A shape with all sides and angles are equal is called a (a)   polygon.

This is an example of (a)  

A shape with 8 sides and 8 angles is called (a)  

The correct name of this angle is (a)  

This is a (a)