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There are some key words that you need to know for circles: radius, circumference, diameter, sector, segment, tangent, chord and arc. In this video you will discover what they all mean.

This video discusses the topic of circles.

This video explains the equation of a circle.

Use the dynamic worksheet to practice simplifying expressions with fractional exponents, rewriting them as radicals.

This online article delves into our the sun and planets were formed.

These four short online lessons will cover the following:

• The planets of the solar system
• Planet orbits in the solar system
• Gravity in the solar system
• Inner vs outer planets

Three activities which illustrate the law of exponents.

This is a simple video which describes how indices problems are solved using simplified laws.

This short online lesson discusses the planet Jupiter.