Simple Machines – Wheel and Axle
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Return to Physics Videos
Conjecture and Theorem Conjecture can be best defined as a hypothesis about a mathematical rule. It is usually created after having witnessed a certain outcome in multiple specific cases. After countless trials are taken to see the validity of a conjecture, if it is proven to be true, it becomes a theorem. A theorem is … Read more
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De Morgan’s Laws Return to Discrete Math Videos
A line of symmetry refers to a line that is drawn through the center of a shape so that it creates two identical halves. Each half is a mirror image of the other. Some shapes have one line of symmetry, like an isosceles triangle, and other shapes have many lines of symmetry. For example, a … Read more
The Independent School Entrance Exam (ISEE) Upper Level is administered by the Educational Records Bureau for children applying to grades 9-12. Over 1,200 private middle schools and high schools use this exam to ensure new students are being admitted to a grade level that best fits their knowledge and abilities. Click “Start Test” above to … Read more
What are Angles? We use degrees as units of measurement for angles, and precisely determining how wide or narrow they are. The small circle symbol “°” is used following a number to denote that degrees are being represented. Note the following classifications: An acute angle is between 0-90° A right angle is 90° An obtuse … Read more
Welcome to the ACT practice test page! Click the “Start Test” button above to begin our free ACT practice test! These ACT practice questions will give you a better idea of what to study for your exam. ACT® is a registered trademark belonging to ACT Education Corp. (“ACT”). ACT is not involved with or affiliated … Read more
Set Operations with Venn Diagrams Return to Discrete Math Videos
The Federal Communications Commission (FCC) provides a Technician Class exam to certify the operation of an amateur station. This page covers the Technician Class radio license needed to operate an amateur radio, also called ham radio. Three levels of ham radio licenses are issued by the FCC, and the technician license is intended for beginners. … Read more