Virtual Nerd
Virtual Nerd: What Is a Rhombus?
This tutorial introduces you to the rhombus and explains its special properties. [5:15]
Sophia Learning
Sophia: Regular Polygons Tutorial
In this video tutorial, students will determine if a polygon is regular by examining the sides and angles for congruency. Check understanding by the assessment. [2:06]
Sophia Learning
Sophia: Different Kinds of Solids
Geometric solids are explored in this video lesson. The tutorial defines and provides examples of six popular solids. Students can check their understanding with an assessment. [9:03]
Virtual Nerd
Virtual Nerd: How Do You Find Missing Angles in a Quadrilateral With Variables?
Watch this tutorial to learn how to create an equation and solve it to find the missing measurements of the interior angles of a polygon. [5:32]
Virtual Nerd
Virtual Nerd: How Do You Find a Missing Angle in a Quadrilateral?
This tutorial demonstrates how to create an equation and solve it to find the missing measurements in a quadrilateral. [4:13]
Khan Academy
Khan Academy: Polygons as Special Curves
You may have learned that triangles, rectangles etc. are all examples of polygons but that circles are not. What exactly makes a curve a polygon?
Shmoop University
Shmoop: Angles of a Polygon
This animation features the mathematical concept of the angles of a polygon and how to use them to perform the calculation of angles. [1:59]