Multiply the perimeter of a smaller polygon by the scale factor to determine if polygons are similar in this video tutorial. [2:16] Assess learning with a quiz.
In this Cyberchase video segment, the CyberSquad learns what happens to the area of a rectangle when the shape enclosed by the perimeter changes.
This short video and interactive assessment activity is designed to teach third graders an overview of area and perimeter.
This short video and interactive assessment activity is designed to teach third graders about given the perimeter, find the side length and area - squares.
Find a quick, concise explanation of circumference. The formula for finding the circumference of a circle is explained.
Find a quick, concise explanation of perimeter. Perimeter formulas are given for common plane figures.
Take a look at this tutorial to learn how to use the formula for the area of a triangle to find the height if you already know the area and the length of the base. [6:09]
Explains how to calculate the area of a rectangle using the formula where area equals length times width. [2:56]
If you know the length of the base and the height of a triangle, it's easy to find the area. This tutorial illustrates how to plug the numbers into the formula for the area of a triangle and solve. [3:44]
Take a look at this tutorial to see how to turn a parallelogram into a rectangle to find the formula for the area. [4:46]
Students apply their knowledge of scale and geometry to design wearables that would help people in their daily lives, perhaps for medical reasons or convenience. Like engineers, student teams follow the steps of the design process, to research the wearable technology field (watching online videos and conducting online research), brainstorm a need that supports some aspect of human life, imagine their own unique designs, and then sketch prototypes (using Paint®). They compare the drawn prototype size to its intended real-life, manufactured size, determining estimated length and width dimensions, determining the scale factor, and the resulting difference in areas. After considering real-world safety concerns relevant to wearables (news article) and getting preliminary user feedback (peer critique), they adjust their drawn designs for improvement. To conclude, they recap their work in short class presentations.