In this video, I go over the top five "trigonometry important formulas" essential for precalculus, but also useful for Algebra 2 and Calculus students. We'll cover the "law of sines" and the "law of ...

A triangle is a polygon. It is a closed 3-sided shape made up of straight lines. The ‘tri-’ part of the word triangle means three. A triangle has 3 sides and 3 angles. Interior angles are the angles ...

In this video, we provide essential "math help" by presenting a step-by-step "geometry proof" that all angles in "triangles" add up to "180 degree". This "math tutorial" will guide you through the ...

Introduction Do you ever use math as a tool to solve interesting problems? In the 1970s math was often taught with simple worksheets. One teacher was looking for a way to help his students have more ...

The base and the perpendicular height are at right angles to each other. The measurements used must be in the same units. For example, to work in cm a 45 mm measurement would have to be converted to ...