Area of Parallelograms

What do you do when you don't think you have enough information? You look for another way to do the problem! Pupils combine what they know about finding the area of a triangle and trigonometry to determine triangle area when they don't...

When algebra and geometry get together, good things happen! Given a system of inequalities that create a quadrilateral, learners graph and find vertices. They then use the vertices and Green's Theorem to find the area and perimeter of...

There are times that it is necessary to add areas to find the area between the curves. The video for AP Calculus presents how to find the area between curves by subtracting the area under the lower curve from the area under the upper...

Triangles are not all created the same. The instructor shows how to find the area of different types of triangles using the formula. She also includes an example requiring coordinate geometry.

Use the formula for the area of a rectangle for more than just rectangles! Scholars see that they can use common area formulas to find the area of irregular shapes. 

Here's an AP Calculus video that provides a discussion on determining an approximate for the area under a curve by calculating the sum of areas of rectangles that is smaller than the area and by finding the sum of areas of rectangles...

Rectangles, parallelograms, and now trapezoids — so many quadrilaterals! Building on the previous lessons in the series, the video introduces the formula for the area of a trapezoid. The instructor shows images of trapezoids and those...

Viewers discover how to apply derivatives to determine dimensions that maximize area with a video that presents a problem that asks for the maximum area of a rectangle inscribed in a circle with radius (r). The instructor demonstrates...

Create a solid understanding of the concept of surface area. Building from the previous lesson in the series, the instructor demonstrates how to apply a formula to find the surface area of a rectangular prism. Examples use the formula to...

Can you find the area of a triangle without knowing the height? Applying trigonometry makes quick work of this type of problem. The video instructor presents problems for scholars to consider and then provides a worked out solution. She...