Finding the area of each of the triangles that are created by drawing two diagonal lines through a rectangle is explored in this lecture. It provides a detailed explanation of how to use a formula to solve the given problem. Tip: Use...

Some students enjoy math problems as "brain teasers," while other students are just trying to get through them. Sal addresses both learners in this video, which shows different ways to approach and solve problems on the practice SAT.

Sal takes viewers into the home stretch of this practice test session from The Official SAT Study Guide. Problems 17-18 are algebraic equations, while problem 19 focuses on area in a given figure (with the use of pi).

Geometry problems on the SAT are often the most difficult for students to solve, let alone master. Focusing on several geometry-related skills (as well a few algebra problems), Sal makes this lesson a valuable resource for viewers who...

Just how much spray paint does a mural require? Using proportions, graffiti artists determine the amount of supplies needed to complete a mural. The creative resource shows how to determine the area of composite figures and uses that...

Using an installment from the Math at the Core series, pupils learn about Kapa cloth, which is made from bark. The video shows how much cloth one cup of bark makes. Then classmates, working in pairs, determine the number of cups of bark...

Just how similar are the areas of similar figures? An educational YouTube video describes how to determine the areas of similar figures. Given the area of one figure and the measurements of corresponding sides of each figure, viewers see...

To find the whole, add and subtract the pieces. A portion of a massive geometry playlist shows how to approach finding the area of a composite figure. The resource works with a couple different composite shapes to find their areas.

Find the square of the scale factor. A component of a large playlist on geometry discusses the ratios of the perimeters and areas of two similar polygons. The resource shows examples in finding the ratios that lead to a pattern.

Sliding over a corner makes a rectangle. The resource demonstrates why the formula of the area of a parallelogram works. As part of a larger playlist on basic geometry, the video works examples dealing with parallelogram areas.

Pick up a resource on Pick's Theorem. Individuals watch a video explaining how to find the area of a polygon drawn on a lattice using Pick's Theorem. The film also shows a proof of the theorem using the Euler characteristic and algebra.

The formula for the area of a triangle is: area equals one half the base times the height. If you have been given these two values then all you need to do is plug them into the formula and solve. Don't forget to write the correct ending...

Trapezoids can be tricky! Break down the process of finding the area of a trapezoid with an engaging math video. Learners explore area formula and shown exactly how to plug in information, solve, and simplify. 

Area=Length x Width. Locate the value of the length of the rectangle and locate the given width and plug them in to solve. Don't forget to include the units and multiply them too.

What a great resource! Two learners lead viewers through the process of finding the area of a trapezoid. It's a visual approach that your class is bound to remember.

Instruct your class on how to find the volume of a triangular pyramid using this tutorial. Learners can watch the video and take notes, later applying what they have seen to class work or homework. A clear video with direct instruction,...

How do you find the volume of a rectangular pyramid? Watch this video and find out! In the tutorial, a lecturer works through an example problem. While she works, she describes each step and each formula necessary to solve the problem. A...

Do you need to find the area of a prism? Watch this video to find out how! An instructor goes through each step, recording her work on a whiteboard for reference. A solid instructional video that could be used at home or in the classroom.

Find the height of a trapezoid given the values of the two bases and the area. First write out the formula for the area of a trapezoid. Then identify all the variables and match up the given values. Now plug the values into the formula....

Learn how to use the formula for area to solve a problem about a rectangle. The demonstrator shows how to plug in the known values of a rectangle, and then how to use the formula for area to solve for the variable in question.

There are three variables in the formula for a parallelogram. Two of the values are given in this problem. Find the third value. Identify what each of the variables means. Match up the given values to the variables. Then solve for the...

So you are trying to tell me that a parallelogram is a rectangle in disguise? Wow! And I can use a similar formula of the area of a rectangle to find the area of a parallelogram? Wow! Ok, show me how! A=bh. So simple really.

Trying to find the area of a rectangle, a triangle, a circle, or a parallelogram? There are specific formulas to use to calculate the area of these shapes. But the given shape is not any of these. It's a composite shape, which means it...

There are basically two things you need to know to find the area of a circle. First, you need to use the correct formula. Second, you have to know the value of the radius. If you know these two things then all you have to do is plug the...