Homeschool Math Blog

I found a neat reference page about the important angle theorems , with visuals AND interactive versions: Includes for example such basics as angles around a point add up to 360 degrees; vertical angles are equal; corresponding angles are equal; and results about the angle sum of a triangle, a quadrilateral, polygons; plus a few more. Go check it out! I feel not only teachers, but students also might enjoy browsing through the page.

This is a set of three geometry videos dealing with angles. First, showing that vertical angles are equal: Next, finding out about the angles in a parallelogram . I start out with two parallel lines and a transversal (line that intersects them both). We explore the angles formed, which some of them are corresponding angles, some are vertical angles. I draw a new line, and get a parallelogram. Lastly, here is a short and easy proof about the angles in a triangle .

I've finally ventured into geometry topics with my latest video: It shows how to use a protractor to measure angles . I show where the "base line" of the protractor is for three different protractors, and use it to find out the angle measure of different kinds of angles (including a reflex angle).