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Articles & Books From Geometry
Don't be a square! Strengthen your geometrical skills Lots of students need extra practice to master geometry. Thankfully, there's Geometry Workbook For Dummies. Packed with hundreds of practice problems and easy-to-understand concept explanations, this book takes a hands-on approach to showing you the geometric ropes.
Just a few practice questions to help you square the circle in geometry Geometry: 1001 Practice Problems For Dummies gives you 1,001 opportunities to practice solving problems from all the major topics in Geometry—in the book and online! Get extra help with tricky subjects, solidify what you’ve already learned, and get in-depth walk-throughs for every problem with this useful book.
Geometry Essentials For Dummies (9781119590446) was previously published as Geometry Essentials For Dummies (9781118068755). While this version features a new Dummies cover and design, the content is the same as the prior release and should not be considered a new or updated product. Just the critical concepts you need to score high in geometryThis practical, friendly guide focuses on critical concepts taught in a typical geometry course, from the properties of triangles, parallelograms, circles, and cylinders, to the skills and strategies you need to write geometry proofs.
Article / Updated 12-08-2016
The basic idea behind copying a given angle is to use your compass to sort of measure how wide the angle is open; then you create another angle with the same amount of opening.Here's the proof diagram. Copying an angle.Refer to the figure as you work through these steps: Draw a working line, l, with point B on it.
Article / Updated 12-08-2016
If you're given two points, and you're asked to find the locus of points equidistant from these two points, you'll always find the same thing: that the locus of points is actually the perpendicular bisector of the segment that joins the two points.If that sounds a little technical, don't worry—the following example will make everything clear!
Article / Updated 12-08-2016
The key to copying a given line segment is to open your compass to the length of the segment; then, using that amount of opening, you can mark off another segment of the same length.Here's the proof diagram. Copying a segment.This figure shows the solution; refer to it as you work through the following steps. Using your straightedge, draw a working line, l, with a point P anywhere on it.
Article / Updated 12-08-2016
If you're given two points on the coordinate plane, you can find the locus of points that creates a right angle to those two points. By using the following steps, you'll soon see an interesting pattern that may, in fact, surprise you.Here's a problem to solve: Given points P and R, what's the locus of points Q such that angle PQR is a right angle?
Article / Updated 12-08-2016
A glide reflection is just what it sounds like: You glide a figure (that's just another way of saying slide or translate) and then reflect it over a reflecting line. Or you can reflect the figure first and then slide it; the result is the same either way. The footprints are glide reflections of each other.A glide reflection is also called a walk because it looks like the motion of two feet, as shown here.
Article / Updated 12-08-2016
In two-dimensional locus problems, all the points in the locus solution lie in a plane. This is usually, but not always, the same plane as the given geometric object.You can use the following four-step solution method to solve a 2-D problem.Start with a problem: What's the locus of all points 3 units from a given circle whose radius is 10 units?
Article / Updated 12-08-2016
A glide reflection involves three reflections, and so it can be challenging to find the location of its main reflecting line. Fortunately, there's a handy theorem that you can use for just that purpose. The main reflecting line of a glide reflection: In a glide reflection, the midpoints of all segments that connect pre-image points with their image points lie on the main reflecting line.