Length: Converting Meters to Feet and Kilometers to Miles
This clip presents practical problems in which meters must be converted to feet, and kilometers must be converted to miles. In the first problem, the student must determine how many feet of telephone cord are on a 100-meter roll. "We'll use the deci...
Length: Converting Inches to Yards, Feet to Miles, and Miles to Inches
This clip presents a variety of unit conversion problems which the student is first asked to write in equation form. The student is then instructed to write out fractions using the appropriate equivalence in each case. After cancellation, the studen...
Angles, Arcs and Sectors: Angles Formed by Intersecting Lines
This clip looks at angles that are formed by two intersecting lines, in the process explaining what constitutes vertical and supplementary angles.
Angles, Arcs and Sectors: Complementary and Supplementary Angles
This clip explains that any two angles that have a sum of 90 degrees are called complementary angles. The clip adds that knowing two angles are complementary allows us to find the measure of one angle when we know the measure of the other. The clip ...
Angles, Arcs and Sectors: Calculating Many Angles When Only One is Known
This clip explains how to use what we know about special angle relationships to find the measure of several angles when we known the measure of just one. The explanation covers vertical angles, alternate interior angles, corresponding angles, supple...
Using Factoring to Solve an Equation
An equation is presented for solution in which factoring must be used. The solution is detailed and checked.
Mathematics and Change
Philosopher Stephen Toulmin explains that contrary to what many believe, mathematics and mathematical assumptions can change "deeply" over time. Professor Toulmin notes that, "...you will find that, beyond a certain point, the link with what we had ...
Some Problems are More Easily Solved Using One Variable
Although many problems can be solved with either one equation or a system of equations, one way will sometimes be easier than the other. A word problem involving finding the price per chair given the number of chairs, the total price, and the amount...
Equation Defined
The definition of an equation.