Discovering Math: Geometry (Grades 6-8) (59:04)
From methods of geometric construction to three-dimensional figures to properties of triangles to representations and transformations, this video introduces middle school students to more advanced properties and concepts of geometry.
- 6-8Grades 6-8
Example 2: Constructing an Angle Bisector (1:44)
A SECTION FROM: Discovering Math: Geometry (Grades 6-8)
A few construction steps lead to the bisection of an angle.
- 6-8Grades 6-8
Defining Properties of Triangles (9:00)
A CHAPTER FROM: Discovering Math: Geometry (Grades 6-8)
Triangles have a number of unique properties involving relative side length and angle size. They are among the most stable of shapes.
- 6-8Grades 6-8
Congruency and Similarity (8:53)
A CHAPTER FROM: Discovering Math: Geometry (Grades 6-8)
The corresponding parts of congruent figures have a ratio of one to one. Corresponding sides of similar figures are proportional.
- 6-8Grades 6-8
The Pythagorean Theorem (8:50)
A CHAPTER FROM: Discovering Math: Geometry (Grades 6-8)
The Pythagorean Theorem states the relationship between the lengths of the sides of a right triangle.
- 6-8Grades 6-8
Defining Properties of 3-D Figures (7:57)
A CHAPTER FROM: Discovering Math: Geometry (Grades 6-8)
The properties of three-dimensional figures can be found in the formulae for their surface area and volume.
- 6-8Grades 6-8
Geometric Transformations (7:37)
A CHAPTER FROM: Discovering Math: Geometry (Grades 6-8)
Computer animators use geometric transformations to create a scene for a program about alien life-forms.
- 6-8Grades 6-8
Introduction (2:36)
A SECTION FROM: Discovering Math: Geometry (Grades 6-8)
Triangles are often used in structures because of their stability.
- 6-8Grades 6-8
Example 1: Properties of a Triangle (2:58)
A SECTION FROM: Discovering Math: Geometry (Grades 6-8)
An equilateral triangle has equal angles. The sum of two of the sides of the triangle are always longer than the third side.
- 6-8Grades 6-8
Example 1: Copying a Triangle (2:06)
A SECTION FROM: Discovering Math: Geometry (Grades 6-8)
Constructing a congruent triangle requires only a compass and a straightedge.
- 6-8Grades 6-8