PPT
Sophia: Using Triangles to Find the Sum of Interior Angles: Lesson 1 PPT
Sophia Learning

Sophia: Using Triangles to Find the Sum of Interior Angles: Lesson 1

For Students 9th - 10th
This lesson demonstrates how to use triangles to determine the sum of the interior angles of a polygon. It is 1 of 5 in the series titled "Using Triangles to Find the Sum of Interior Angles."
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Graphic
Wolfram Math World: Alcuin's Sequence Graphic
Wolfram Research

Wolfram Math World: Alcuin's Sequence

For Students 9th - 10th
A demonstration of Alcuin's Sequence.
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