Khan Academy
Khan Academy: Intro to Quadrilaterals
Sal Khan discovers attributes and features of four-sided shapes, including parallelograms, rhombuses, rectangles, and squares. [8:06]
PBS
Pbs Learning Media: Peg + Cat: Geometry Collection
This collection includes 16 Peg + Cat video clips about geometry including 2-D and 3-D shapes.
Sophia Learning
Sophia: Double Diagonals of a Square: Lesson 4
The fact that that when both diagonals are drawn in on a square, four congruent 45-45-90 triangles are formed is discussed in this lesson. It is 4 of 5 in the series titled "Double Diagonals of a Square."
Sophia Learning
Sophia: Double Diagonals of a Square: Lesson 1
The fact that that when both diagonals are drawn in on a square, four congruent 45-45-90 triangles are formed is discussed in this lesson. It is 1 of 5 in the series titled "Double Diagonals of a Square."
Sophia Learning
Sophia: Finding Area With Squares: Lesson 7
Step by step, this lesson will show you how to add up the number of squares that cover an object in order to find the area of a figure. It is 7 of 7 in the series titled "Finding Area with Squares."
Sophia Learning
Sophia: Coordinate Geometry of Square: Lesson 2
This lesson [7:10] will demonstrate how to use slope, midpoint, and distance formulas to determine from the coordinates of the vertices if a quadrilateral is a square in a coordinate plane. It is 2 of 3 in the series titled "Coordinate...
Sophia Learning
Sophia: Coordinate Geometry of Square: Lesson 3
This lesson will demonstrate how to use slope, midpoint, and distance formulas to determine from the coordinates of the vertices if a quadrilateral is a square in a coordinate plane. It is 3 of 3 in the series titled "Coordinate Geometry...
Sophia Learning
Sophia: Coordinate Geometry of Squares: Lesson 1
This lesson [8:34] will demonstrate how to use slope, midpoint, and distance formulas to determine, from the coordinates of the vertices, if a quadrilateral is a square in a coordinate plane. It is 1 of 2 in the series titled "Coordinate...
Sophia Learning
Sophia: Coordinate Geometry of Square: Lesson 1
This lesson will demonstrate how to use slope, midpoint, and distance formulas to determine from the coordinates of the vertices if a quadrilateral is a square in a coordinate plane. It is 1 of 3 in the series titled "Coordinate Geometry...
Sophia Learning
Sophia: Double Diagonals of a Square
The fact that that when both diagonals are drawn in on a square, four congruent 45-45-90 triangles are formed is discussed in this lesson.
Expansion Learning
Expansion Learning: Basic Shapes (Part One)
Video provides students with an explanation of the basic shapes of square, rectangle, triangle, and circle.