Category: Geometry & Trigonometry

In trigonometry, we often use common input angles (such as 30 or 60 degrees) for the sine function.  It helps to know the corresponding outputs for these common angles to increase your...

In geometry, you will often compare triangles to see if their side lengths or angles are the same.  Congruent triangles are exactly the same in terms of side lengths and angles – but what...

We can inscribe lots of different shapes inside of a circle, including triangles, squares, pentagons, and others. An inscribed shape inside of a circle is as large as possible while still fitting...

The perimeter of a square tells us how far we would have to walk to go around a square, walking along each side and turning 90 degrees at the corners.  It is useful to know how to find the...

The area of a square tells us how many square tiles (with a side length of 1 unit) would fit inside of the square.  It is helpful to be able to find the area of a square given information about...

For the graph of a parabola, we would use a quadratic equation y = ax2 + bx + c to represent it.  However, there is another way: using a point (the focus) and a horizontal line (the...