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What is a vertex? And how does algebra figure into geometry? This program examines all things angular, including acute, right, obtuse, straight, adjacent, complementary, supplementary, and vertical angles. Four theorems are also introduced, along with the reflexive, substitution, and transitive properties. A proof of the congruency of vertical angles is performed as well. (14 minutes)



 
                

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Copyright date: ©1999




     


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Surface Area and Volume
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Whether wallpapering a footlocker or filling a cylinder with corncobs, a knowledge of three-dimensional shapes is essential. This program demystifies the subjects of surface area and volume by sharing solid information backed up by the surface area f...(more details)
 
Geometry Basics
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This program presents the building blocks that every student of geometry needs to understand. Topics addressed include inductive and deductive reasoning; terminology such as points, lines, planes, and space; six core postulates; five essential theore...(more details)
 
Introduction to Triangles
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Can a used-car salesman introduce the subject of triangles? One does in this program, which begins with the fundamentals, including how to classify triangles both by their sides and by their angles. In addition, two theorems are introduced and proved...(more details)
 
Quadrilaterals and Other Polygons
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In this program, an explorer, a secret agent, and other experts take a look at the wide spectrum of polygons, ranging from triangles to n-gons. An examination of the general properties of polygons, including a discussion of concave and convex regions...(more details)
 
Parallel Lines and Angles
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Euclid may not have invented parallel lines, but he was probably the first to recognize their implications. This program wraps up the topic of angles by introducing the Parallel Postulate and the Corresponding Angle Postulate, along with three theore...(more details)
 


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