This tutorial provides a brief introduction about what area is, then gives the formulas for area of a square, rectangle, parallelogram, trapezoid, triangle, and circle. Examples of each formula are provided.

The purpose of this task is to ask students to write expressions and to consider what it means for two expressions to be equivalent. Aligns with 6.EE.A.

[Free Registration/Login may be required to access all resource tools.] This study guide reviews the formulas for area and perimeter of triangles and different kinds of quadrilaterals.

[Free Registration/Login Required] This flipchart explores the formula for finding the area of a triangle. Examples and hints are given to help students. A video clip is included, showing how to find the height of a triangle, given the...

Students understand the concept of perimeter of a square, and discover its formula.

The Math Forum offers an archive of question and answer sessions on circles and how they relate to geometry.

WebMath will calculate the side length, diagonal length, perimeter, area, or volume, given the side, perimeter, diagonal, or area. This site also displays formulas for a square.

Introduces how to set up and solve simple geometric-figure word problems. Includes advice regarding formulas to memorize.

In this lesson plan, 7th graders use the formula for circles to determine the area and perimeter.

MathWorld provides multiple definitions and formulas for the mathematical term, square.

Webmath will calculate the side length, diagonal length, perimeter, area, or volume, given the side, perimeter, diagonal, or area. This site also displays formulas for a square.

Explore and learn about the features and properties of a right triangle in this lesson. Includes examples and practice questions.

[Free Registration/Login Required] This flipchart provides a review of polygons and formulas for calculating perimeter and area in the form of assessment questions.