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Is the converse of a right triangle a wrong triangle? This program sets the record straight, using the CPCTC definition—Corresponding Parts of Congruent Triangles are Congruent—and right triangles to prove congruency of diverse elements of parallelograms and isosceles triangles. The Angle-Angle-Side and Hypotenuse-Leg Theorems are also presented. (13 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)
 
Units, Perimeter, Circumference, and Area
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When it comes to measuring flat shapes, geometry generously provides a formula for every occasion. This program begins with an overview of how to convert English and metric units of measurement. Next, finding the perimeter of polygons is illustrated,...(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)
 
Similar Triangles
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If Pam and a telephone pole are each casting a shadow, how can the height of the pole be determined indirectly? This program keeps the subject of similar triangles in proportion as it describes the Angle-Angle Similarity Postulate and the Side-Angle-...(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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