When finding probability its just a matter of knowing all possible outcomes and the specific outcomes you are looking for. Below are videos that introduce probability then explore a couple of examples.
Using the general concept to find the volume of a prism, the video below works specifically with a triangular prism.
The links below are to a site that look at the most common 3-dimensional shapes and how to find the volume for each.
The video below covers how to determine if two given triangles are congruent using postulates and theorems (SSS, SAS and ASA).
If you are still wanting more examples and methods for determining congruence, follow the link below.
Practice your learned skills on the activity page at Khan Academy.
There are a lot of websites and videos out there to help with the quadratic formula. The two videos below are from Khan Academy and use the quadratic formula to solve example problems.
Practice what you have just watched by clicking on the button below:
Below is a link to a lesson and practice page created by Adams 12 math coach to help students solve quadratic functions by factoring. Several examples are provided with each step worked out.
For every quadratic function , the coefficients and constants tell a lot about the shape and location of the parabola created by the function. Here is a link to a website in which you can see the shape and location of the parabola changing as you change the numbers found int he function.
This is also a great site to graph quadratic functions found in any homework or own your own review.
When trying to find the maximum or minimum of a parabola or quadratic function, the exact location of the vertex can be found by taking the coefficients of the quadratic function and plugging them into a simple equation. After viewing the video, practice locating the vertex by following the link given below.
Below are two videos from Khan Academy that focus on factoring monomials and binomials. Both are helpful skills in solving quadratic equations.
This video focuses on the process of distributing when multiplying binomials. There are two practice links below in which you can receive immediate feedback on your understanding of the skill.
All the videos I found on this topic where so entrenched in physics that I felt they would be more confusing than helpful. Here are two website links to webpages focused on describing projectile motion as a quadratic equation and how to problem solve with the information it provides.
The link below is to a website in which you practice applying your skills and understanding of projectile motion and quadratic functions.