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Why do we do Geometry? To discover patterns, find areas, volumes, lengths and angles, and better understand the world around us. Plane Geometry. Plane Geometry is all about shapes on a flat surface (like on an endless piece of paper). 2D Shapes; Activity: Sorting Shapes; Triangles; Right Angled Triangles; Interactive Triangles
Common Symbols Used in Geometry. Symbols save time and space when writing. Here are the most common geometrical symbols: Symbol. Meaning. Example. In Words. . Triangle.
Test Your Tables with an interactive quiz. Mathematics is commonly called Math in the US and Maths in the UK. Math explained in easy language, plus puzzles, games, worksheets and an illustrated dictionary. For K-12 kids, teachers and parents.
Plane Geometry is about flat shapes like lines, circles and triangles ... shapes that can be drawn on a piece of paper. Hint: Try drawing some of the shapes and angles as you learn ... it helps.
Geometric Constructions ... Animated! "Construction" in Geometry means to draw shapes, angles or lines accurately. These constructions use only compass, straightedge (a ruler, but not using the numbers) and a pencil. This is the "pure" form of geometric construction: no numbers involved!
Equilateral, Isosceles and Scalene. There are three special names given to triangles that tell how many sides (or angles) are equal. There can be 3, 2 or no equal sides/angles:
Trigonometric and Triangle Identities. And as you get better at Trigonometry you can learn these: The Trigonometric Identities are equations that are true for all right-angled triangles. The Triangle Identities are equations that are true for all triangles (they don't have to have a right angle).
Test your math skills! Ace that test! See how far you can get! You can view them on-screen, and then print them, with or without answers. Every worksheet has thousands of variations, so you need never run out of practice material.
Learn about reflection in mathematics: every point is the same distance from a central line.
Illustrated Mathematics Dictionary. Easy-to-understand definitions, with illustrations and links to further reading. Browse the definitions using the letters below, or use Search above.