.Surely you’ve discovered that the figure below is clipped from a pentagon. Right? Yeh! let us focus within the border drawn with a crayon, that is, within triangle DAB. How many isosceles are there within it? (For the moment, ignore the smaller pentagram A’C’E’B’D’ and all the triangle formed by their intersections.) Let’s count it!…

# Tag Archive for G-8

### Geometry, Junior Math (Gr 6 - 9), Math BASICS

# Protected: Regular Polygons and Perfect Circles – Defs & Principles

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### Junior Math (Gr 6 - 9), Skills in Math Contests

# Sample Questions for Gauss Contests

Gauss contests are very popular math contest in Canada, for grade 7-8 students. Questions range from pretty easy to somewhat challenging.

The sample questions chosen here are on the challenging sides.

You can try your talent on these questions!

### Geometry, Math BASICS, Numbers

# Protected: The (3-4-5) Pattern for Pythagorean Triplets

There is no excerpt because this is a protected post.

### Geometry, High School Math, Methods of Learning

# Protected: Circular Geometry and Thales’ Theorem

There is no excerpt because this is a protected post.

### Junior Math (Gr 6 - 9), Numbers

# What’s So Special about Number 8208?

The seemingly trivial, innocent number 8208 actually has something special. It is a member of a niche class of numbers called narcissistic numbers. And it has an interesting property that 8^{4} + 2^{4} + 0^{4} + 8^{4}= 8208.

Why the name narcissistic number? Keep reading, you’ll find out.

### Geometry

# Hypotenuse of a Right Triangle — by Area Approach (2)

Continuing from Part one of this article. We look at the hypotenuse when the two legs are in 1:2.

### Algebra, Junior Math (Gr 6 - 9), Methods of Learning, Numbers

# A Magic-square Like Puzzle, with Usual and Shortcut Solutions

Once we understood a math problem, and mastered relevant methods, we can find many different ways to solve the problem. That is, there are many shortcuts.

### Algebra, Equations and Inequalities, Junior Math (Gr 6 - 9), Math BASICS, Numbers

# Solve /Find a Number by Algebra

Word problems with numbers are a convenient facility to learn equations.