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Arabic Alphabet Tutorial
Read the Fine Print
Educational Use
Rating

This website shows images and video of the Arabic letters. It has two sections, one with the Arabic letters in their independent, unconnected forms, and a second showing the letters in all of their various connected forms. Both sections offer videos that show a calligrapher writing out each form of each letter. Videos of the connected letters include words that demonstrate the initial, medial, and final positions of each letter.

Material Type:
Reading
Provider:
Stanford University
Date Added:
11/06/2012
Inscribed Angles That Intercept the Same Arc
Conditional Remix & Share Permitted
CC BY-NC-SA
Rating

If two inscribed angles intercept the same arc, then the angles are equal. Drag the orange points to change the figure.

نوع المادة:
Activity/Lab
Diagram/Illustration
Homework/Assignment
تفاعلية
محاكاة
Teaching/Learning Strategy
Provider:
Wolfram Research
Provider Set:
Wolfram Demonstrations Project
المؤلف:
Jay Warendorff
Date Added:
09/04/2013
Length Scales in the Solar System
Conditional Remix & Share Permitted
CC BY-NC-SA
Rating

A dynamically simplified solar system is constructed from online data to explore the real solar system on many different scales.

The realistically scaled solar system is surprising because nothing is visible due to the presence of many different scales. That is why it is usually rescaled in animations or illustrations. This is nice but gives us a wrong sense of distances and sizes. This Demonstration is intended to show the solar system's different scales in their full glory.

Since it is hardly possible to see anything when the real scales are used, controls have been added to modify the sizes of the celestial bodies.

Material Type:
Activity/Lab
Diagram/Illustration
Homework/Assignment
Interactive
Simulation
Teaching/Learning Strategy
Provider:
Wolfram Research
Provider Set:
Wolfram Demonstrations Project
Author:
Cedric Voisin
Date Added:
09/04/2013