## Fun Geometry with PolygonFlux iPad App

One of the Geometry app I am currently enjoying playing is the PolygonFlux iPad app. This app shows the path of a point reflected inside a regular polygon creating beautiful patterns. The location and direction of the emitter can be changed, so you can create as many patterns as possible.

This application costs \$0.99.

You can choose different polygons: triangle, square, pentagon, or polygons up to 14 sides. You can also choose from different themes and send your patterns to friends through email.

## The Good Grapher Scientific Calculator iPhone and iPad App

To mathematics students and enthusiasts who are looking for a free calculator app, you might want to look at the Good Grapher App. The Good Grapher app is an excellent grapher with lots of features. It can be used from elementary school up to graduate school. It is available as iPhone and iPad apps.

Image Credit: iTunes

Below are only some of its amazing features.

• supports real and complex numbers
• has astronomical, atomic, electromagnetic, mathematical, physicochemical, universal constants
• modular and factorial operations
• assignment operators for storing values
• 2d and 3d graphs with customizable colors and table of values
• multi-touch support
• contains math solver (solving equations)

Note: I am not receiving any compensation  in reviewing software. I write about them because I personally like them and believe that they can be of help to others.

## Introduction to Age Problems in School Mathematics

Age Problems is the second part of the Math Word Problem Solving Series here in Mathematics and Multimedia. In this series, we are going to learn how to solve math word problems involving age.

Age problems are very similar to number word problems. They are easy to solve when you know how to set up the correct equations. Most of the time, this type of problem discusses the age of a certain individual in relation to another in the past, present, or future.

Below, are some of the common phrases used in age problems. In all the phrases, we let x be the age of Hannah now.

• Hannah’s age four years from now (x + 4)
• Hannah’s age three years ago (x – 3)
• Karen is twice as old as Anna (Karen’s age: 2x)
• Karen is thrice as old as Anna four years ago (Karen’s age: 2(x-4))

In solving age problems, creating a table is always helpful. This is one of the strategies that I am going to discuss in this series. As a start, we discuss one sample problem. » Read more