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Date : 2009-07-01

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Circle ~ A line that just touches the circle as it passes by is called a Tangent A line that cuts the circle at two points is called a Secant A line segment that goes from one point to another on the circles circumference is called a Chord If it passes through the center it is called a Diameter And a part of the circumference is called an Arc

Circle formulas in math Area Circumference Sector ~ Circle Formulas in Math Area and circumference of a circle Here Origin of the circle O Diameter D and Radius r Area of a circle A π r 2 π4 D 2 07854 D 2 Circumference of a circle C 2 π r π D Area of circle 12 x Circumference x radius A 12 x C x r Diameter of a circle D √A07854

The Geometry of Circles ~ The Geometry of Circles Cool Math has free online cool math lessons cool math games and fun math activities Really clear math lessons prealgebra algebra precalculus cool math games online graphing calculators geometry art fractals polyhedra parents and teachers areas too

Semicircle Definition Illustrated Mathematics Dictionary ~ Half a circle made by a diameter and the connecting arc Its area is half of a circles area π r 2 2 Its perimeter is half of a circles perimeter plus the diameter π r 2r

Circles math ~ Free math lessons and math homework help from basic math to algebra geometry and beyond Students teachers parents and everyone can find solutions to their math problems instantly

Geometry ~ Geometry Geometry is all about shapes and their properties If you like playing with objects or like drawing then geometry is for you Geometry can be divided into Plane Geometry is about flat shapes like lines circles and triangles shapes that can be drawn on a piece of paper

Interactive Math Activities Demonstrations Lessons with ~ a website dedicated to Math lessons demonstrations interactive activities and online quizzes on all areas of geometry algebra and trigonometry Interactive Math Activities Demonstrations Lessons with definitions and examples worksheets Interactive Activities and other Resources

Radians ~ Radians Preferred by Mathematicians Because the radian is based on the pure idea of the radius being laid along the circumference it often gives simple and natural results when used in mathematics For example look at the sine function for very small values

ESL If I Was vs If I Were ~ If she were here she would explain the situation The second group of sentences refers to a situation that was always true in the past In this case the past simple is used If I were is used to express an imaginary situation in the present If I were you I would take a vacation I would give the test again if I were the teacher

Math is Fun ~ Math explained in easy language plus puzzles games worksheets and an illustrated dictionary For K12 kids teachers and parents