Other
Nearpod: Perimeters of Polygons
In this lesson on finding the perimeter of rectangles, 3rd graders learn key vocabulary, explore grid paper, and apply their learning to a real-world situation.
Illustrative Mathematics
Illustrative Mathematics: F Tf, G Co, Trigonometric Identities and Rigid Motions
The purpose of this task is to apply translations and reflections to the graphs of the functions f(x)=cos x and g(x)=sin x in order to derive some trigonometric identities. There are also rotations 180 degrees about points on the x-axis...