Articles & Books From Geometry

Geometry Workbook For Dummies
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.
Article / Updated 10-26-2022
The volume of an object is how much space the object takes up — or, if you were to drop the object into a full tub of water, how much water would overflow.To calculate the volume of a cylinder, you need to know its height and the area of its base. Because a cylinder is a flat-top figure (a solid with two congruent, parallel bases), the base can be either the top or bottom.
Article / Updated 09-16-2022
Using geometry symbols will save time and space when writing proofs, properties, and figuring formulas. The most commonly used geometry symbols and their meanings are shown below.
Article / Updated 07-29-2022
Triangles are classified according to the length of their sides or the measure of their angles. These classifications come in threes, just like the sides and angles themselves.The following are triangle classifications based on sides: Scalene triangle: A triangle with no congruent sides Isosceles triangle: A triangle with at least two congruent sides Equilateral triangle: A triangle with three congruent sides (For the three types of triangles based on the measure of their angles, see the article, “Identifying Triangles by Their Angles.
Geometry: 1001 Practice Problems For Dummies (+ Free Online Practice)
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.
Cheat Sheet / Updated 03-09-2022
Geometry is full of formulas, properties, and theorems. You can become successful in geometry by remembering the most important ones and learning how to apply them. Use this reference sheet as you practice various geometry problems to grow your knowledge and skills.Geometry practice problems with triangles and polygonsA polygon is a geometric figure that has at least three sides.
Cheat Sheet / Updated 02-08-2022
Successfully understanding and studying geometry involves using strategies for your geometry proofs, knowing important equations, and being able to identify commonly used geometry symbols.Geometry formulas, theorems, properties, and moreWhat follows are over three dozen of the most important geometry formulas, theorems, properties, and so on that you use for calculations.
Article / Updated 12-21-2021
On a map, you trace your route and come to a fork in the road. Two diverging roads split from a common point and form an angle. The point at which the roads diverge is the vertex. An angle separates the area around it, known in geometry as a plane, into two regions. The points inside the angle lie in the interior region of the angle, and the points outside the angle lie in the exterior region of the angle.
Article / Updated 09-17-2021
A circle's central angles and the arcs that they cut out are part of many circle proofs. They also come up in many area problems. The following figure shows how an angle and an arc are interrelated. A 60-degree central angle cuts out a 60-degree arc. Arc: An arc is simply a curved piece of a circle. Any two points on a circle divide the circle into two arcs: a minor arc (the smaller piece) and a major arc (the larger)—unless the points are the endpoints of a diameter, in which case both arcs are semicircles.
Article / Updated 07-12-2021
There are five ways in which you can prove that a quadrilateral is a parallelogram. The first four are the converses of parallelogram properties (including the definition of a parallelogram). Make sure you remember the oddball fifth one — which isn’t the converse of a property — because it often comes in handy: If both pairs of opposite sides of a quadrilateral are parallel, then it’s a parallelogram (reverse of the definition).