Discovering Perimeter

High schoolers investigate area and perimeter of various shapes.  In this area and perimeter of various shapes lesson, students record how area of shapes change when a dimension is doubled, halved, quartered, etc.  High schoolers make...

High schoolers investigate the concepts of area and perimeter. The activity uses a legend to create a context for the proposed word problem. They use the skill of estimation in order to create an ox skin that is found in the story. 

How many sides does that polygon have? Building directly from lesson number eight in this series, learners now find the area and perimeter of any polygon on the coordinate plane. They decompose the polygons into triangles and use Green's...

Students explore pi. In this circle measurement instructional activity, students define and identify radius, diameter, circumference, and perimeter. Students work in groups to measure several plastic lids and record their findings....

Strive to think outside of the quadrilateral parallelogram. Worksheet includes two problems applying prior knowledge of area and perimeter to parallelograms and trapezoids. The focus is on finding and utilizing the proper formula and...

Students determine how to find the perimeter of a rectangle. In this perimeter lesson plan, students make rectangles of given sizes using a 20" string. They record the the length, width, and perimeter of each rectangle. They discover the...

Discover how to find the algebraic formula for the perimeter of a rectangle through this tutorial. Your algebra learners will be guided towards the thinking steps around this concept. After showing the video, invite your class to model...

Consider the relationship between side length and area as an input-output function. Scholars create input-output tables for the area of squares to determine an equation in the first installment of a three-part unit. Ditto for the area of...

Young scholars discover a formula for finding the perimeter of a rectangle by using string. After a lecture/demo, students receive a worksheet with pre-drawn rectangles so they can practice computing perimeter with their string.

Discover the peculiar geometric property of the curve of constant width, the Reuleaux triangle, and their intriguing connection to manhole covers with yet another fascinating TED-Ed video.