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3. Calculate intersection point
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Now we are ready to calculate an intersection point using our ray CP (parametric form) and our line AB (slope-intercept form).

Subject:
Computer Science
Creative and Applied Arts
Graphic Arts
Information Technology
Life Science
Physical Science
Material Type:
Lesson
Provider:
Khan Academy
Provider Set:
Pixar
Author:
Disney Pixar
Khan Academy
Date Added:
08/10/2021
3. Calculating factorials
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Now that we have a feeling for constructing permutations let's introduce the factorial formula to make counting them easy.

Subject:
Computer Science
Creative and Applied Arts
Graphic Arts
Information Technology
Life Science
Physical Science
Material Type:
Lesson
Provider:
Khan Academy
Provider Set:
Pixar
Author:
Disney Pixar
Khan Academy
Date Added:
08/10/2021
3. Completing the proof
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In this video we'll uncover the connection between the previous diagram and the rotation formulas. Repeat viewing suggested!

Subject:
Computer Science
Creative and Applied Arts
Graphic Arts
Information Technology
Life Science
Physical Science
Material Type:
Lesson
Provider:
Khan Academy
Provider Set:
Pixar
Author:
Disney Pixar
Khan Academy
Date Added:
08/10/2021
3. Fun with weights
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Let's take a closer look at the weights used during subdivision. Do we have to be careful when selecting weights?

Subject:
Computer Science
Creative and Applied Arts
Graphic Arts
Information Technology
Life Science
Physical Science
Material Type:
Lesson
Provider:
Khan Academy
Provider Set:
Pixar
Author:
Disney Pixar
Khan Academy
Date Added:
08/10/2021
3. Light rays
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Let's look more closely at how light bounces when it strikes an object. We'll cover reflected and refracted rays.

Subject:
Computer Science
Creative and Applied Arts
Graphic Arts
Information Technology
Life Science
Physical Science
Material Type:
Lesson
Provider:
Khan Academy
Provider Set:
Pixar
Author:
Disney Pixar
Khan Academy
Date Added:
08/10/2021
3. Parabolic arcs
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Are we really creating parabolic curves using this construction? Let's gain some insight first.

Subject:
Computer Science
Creative and Applied Arts
Graphic Arts
Information Technology
Life Science
Physical Science
Material Type:
Lesson
Provider:
Khan Academy
Provider Set:
Pixar
Author:
Disney Pixar
Khan Academy
Date Added:
08/10/2021
3. Putting shapes together
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Use an array to store many objects as well as create any shape you can imagine. Click here to review objects.

Subject:
Computer Science
Creative and Applied Arts
Graphic Arts
Information Technology
Life Science
Physical Science
Material Type:
Lesson
Provider:
Khan Academy
Provider Set:
Pixar
Author:
Disney Pixar
Khan Academy
Date Added:
08/10/2021
3rd graders build robots at Santa Rita Elementary School
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Mrs. Rowhani's third graders learn about matter and energy by building a Spout bot with Khan Academy. Special thanks to: Santa Rita's volunteer parents, Kami Thordarson, Karen Wilson and of course Laleh Rowhani the class teacher. Created by Karl Wendt.

Subject:
Engineering
Life Science
Physical Science
Material Type:
Lesson
Provider:
Khan Academy
Provider Set:
Khan Academy
Author:
Karl Wendt
Date Added:
02/18/2013
4. Casting problem
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Now it's time for a really meaty problem! How can we count the number of possible casts when given a large set of robots to choose from?

Subject:
Computer Science
Creative and Applied Arts
Graphic Arts
Information Technology
Life Science
Physical Science
Material Type:
Lesson
Provider:
Khan Academy
Provider Set:
Pixar
Author:
Disney Pixar
Khan Academy
Date Added:
08/10/2021
4. How can we prove this?
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Okay we know how to calculate the touching point, great! Next let's think about how we can prove this is true.

Subject:
Computer Science
Creative and Applied Arts
Graphic Arts
Information Technology
Life Science
Physical Science
Material Type:
Lesson
Provider:
Khan Academy
Provider Set:
Pixar
Author:
Disney Pixar
Khan Academy
Date Added:
08/10/2021