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Corners in a quadrilateral
Sum of the four angles in a quadrilateral is 360 degrees. Calculate the size of an angle, based on three given angles.
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Sine function
Elements of the sine function: amplitude, equilibrium line and period. You receive a job description and get the requested information from it.
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Working out squares with remarkable products
Calculate the following squares using the rule of remarkable products.
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Distributivity in multiplication
Working out multiplications using distributivity: e.g. 31x11 = (30+1)x(10+1) = 300 + 30 + 10 + 1 = 341.
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Square roots of natural numbers
This exercise is about square roots of natural numbers, which have a natural number as a solution.
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Muscles: Construction and function
The muscles: in this lesson video we discuss the structure, function and operation of the muscles.
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Joints: Types and function
In this lesson we discuss the function and types of joints in the human body:
- ball joint,
- roller joint,
- elliptical joints,
- saddle joint,
- hinge joint,
- plane joint.
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Skeleton: Construction and function
A short lesson video explaining the basics of the skeleton, structure and function.
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Biomolecules
Biomolecules: a brief but complete overview of the different biomolecules in the human body:
- saccharides or sugars;
- lipids or fats;
- proteins or proteins;
- DNA and RNA.
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Setting up reaction equations: Guided practice
Do you have difficulties drawing up chemical reaction equations? These guided exercises will help you arrive at the correct reaction equation quickly and easily.
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Drawing up a reaction equation: Tips
Difficulties with formulating reaction equations? These tips will help you or your students to prepare reaction equations easily and correctly. A separate video has been developed for the exercises.
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Karyogram and cell cycle
Have you ever wondered how scientists study the chromosomes in our cells? Or how they can detect abnormalities in the genetic material? Today we delve deeper into the world of the karyogram, a powerful tool that provides us with insight into …
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