Math Antics
Polygons
What shapes classify as a polygon? The resource provides the definition of a polygon and provides examples of polygons and shapes that are not polygons. The presentation gives an explanation of why each shape falls into the particular...
Mathed Up!
Angles in Polygons
Show your class that finding angle measures is a regular calculation with a resource that provides 12 problems dealing with the measures of angles in regular polygons. Pupils use formulas for the sum of measures of angles in a polygon to...
Krista King Math
Surface Area of Regular Pyramids
Paint, wrapping paper, frosting—so many applications of surface area. The video provides an explanation of the surface area formula and how to apply it to regular pyramids.
Corbett Maths
Angles in Polygons
Learn to look at polygons from the right angle. Scholars first use the formula (n - 2) * 180 to determine the sum of the interior angles of a polygon. The video then asks them to consider the sum of the exterior angles.
Numberphile
Pi
Behind every number is a good story. Scholars learn how Archimedes tried to estimate the value of pi through inscribed and circumscribed figures. Viewers also see how they can use infinite series to find the value of pi by watching a...
Virtual Nerd
Virtual Nerd: What Is a Regular Polygon?
View this tutorial to learn what special properties a polygon must have to be called a regular polygon. [5:36]
Sophia Learning
Sophia: Diagonals in Regular Polygons
In this video tutorial, the instructor demonstrates how to determine the number of diagonals in a regular polygon by looking at the number of vertices, and the number of diagonals. Use the formula to complete the assessment to check...
Sophia Learning
Sophia: Diagonals in Regular Polygons
In this video tutorial, the instructor uses data to derive the formula to solve for number of diagonals in a regular polygon. Assess understanding with a quiz. [5:43]
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: Regular Polygons Tutorial
This video tutorial demonstrates how to use the terms equiangular and equilateral to determine if a polygon is regular or irregular. Check understanding with the assessment. [6:07]
Sophia Learning
Sophia: Regular Polygons
Understand the what a regular polygon is and examples of regular polygons in this video tutorial. Assess learning with a quiz. [3:17]
Sophia Learning
Sophia: Area of Regular Polygons
This video lesson demonstrates how to find the area of any regular polygon using the apothem. Students can check their understanding with an assessment.
Sophia Learning
Sophia: Regular Polygon Diagonals Practice
The instructor of this video lesson demonstrates how to find the number of diagonals in a regular polygon using a formula. [3:01]