This module shows you how to prove the Pythagorean Theorem visually.

Look at the coordinate grid in this module and identify a system of equations that has a single solution, and a system with no solution.

Learn a method to test a solution for a system of equations.

In this video segment from *Cyberchase,* Matt and Digit need to set up tables so that 20 workers will each have a spot at a table in order to assemble their circuit boards. Matt and Digit want to know the number of tables they need so that they can transport them all at once. Matt decides to use small shingles to represent the tables and washers to represent workers. He tests his ideas by positioning the washers around the shingles. Check out "Arrangement 2" and "Arrangement 3" to view Matt's other attempts to solve the problem.

Do the lines intersect or stay apart? If they intersect, do they create a 90 degree angle? These are the questions we ask about parallel and perpendicular lines.

Comparing place values

Find the correct angle name(s) in this example exercise.

We're mixing it up by placing both fractions and decimals on the same number line. Great practice, because you need to move easily between the two.

Mom asks you to be home by 5:45. You know the number of minutes it takes to get home. What time do you leave?

Here's a big number that needs to be expressed in standard form. Can you do this example with us?