Make lesson planning easy with this no-prep Circumference - Area of Circles, Parallelograms, Triangles, Trapezoids, and Irregular Figures Unit! Included are 8 ready-made lessons to teach circumference and area of circles, area of parallelograms, triangles, trapezoids, and irregular figures. This unit is very easy to use and will save you a lot of time! Your students will learn how to find the circumference and area of circles, area of parallelograms, triangles, trapezoids, and irregular figures